A phone power bank will not charge a laptop. The ones built for phones top out around 20 watts, and the moment you plug one into a USB-C laptop port the machine either refuses outright or charges at a trickle it will hold for a few minutes before going backwards. The best power banks for laptops are a different category of product, and the gap between a 20W pack and a 140W pack is not a price tier, it is the difference between an ornament and a working charger.
Three numbers decide whether a pack works for your machine: output wattage (how hard it can push), capacity in watt-hours (how long it can keep pushing), and the USB-C Power Delivery profile it negotiates. Get those three right and almost anything with a USB-C port will charge. Get them wrong and you get the single most common complaint in buyer forums: a full pack that empties without ever completing a charge.
Our answer up front: the Anker 737 Power Bank (140W, 24,000mAh) is the best power bank for laptops overall in 2026. It carries the highest review volume of any pack we looked at, its 140W USB-C output is enough to fast-charge a 14-inch MacBook Pro, and the smart display on the front tells you exactly what the pack is doing instead of leaving you guessing. If you need more ports and less weight in your bag, the UGREEN Nexode 25,000mAh 200W model adds a second high-wattage USB-C port for multi-device work.
We compared ten packs across six weeks of travel, desk and gaming-laptop use, cross-referencing manufacturer specifications with what owners actually report after months of living with them. Everything below is written for people who want to stop hunting for outlets, whether that is a long flight, a conference day, a field shoot, or simply a desk where the one free socket is taken. If you are still choosing a laptop itself, our guide to the best convertible laptops covers the machines most of these packs get paired with.
Top 3 Laptop Power Banks in 2026
These three cover the widest range of real setups: the single best all-rounder, the multi-device travel pack, and the strongest value at high wattage.
Anker 737 Power Bank 140W 24000mAh
- 140W two-way Power Delivery 3.1
- Smart display shows live wattage
- Three ports
- 24000mAh
Anker Laptop Power Bank 25000mAh 165W
- Three 100W USB-C ports
- Dual built-in cables
- Pass-through charging
- 25000mAh
UGREEN Nexode 25000mAh 145W
- 145W total output
- PD 3.1 on USB-C1
- Digital display
- Includes 100W cable
Best Power Banks for Laptops in 2026: All 10 Compared
Every pack below is 20,000mAh or larger and puts out at least 100W, which is the floor for reliable laptop charging. Sort this table by output wattage if you know your machine’s requirement, or by capacity if you are flying.
| Product | Specifications | Action |
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| Anker 737 Power Bank 140W 24000mAh |
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| Anker Laptop Power Bank 25000mAh 165W |
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| UGREEN Nexode 25000mAh 145W |
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 INIU Laptop Power Bank 25000mAh 100W |
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 UGREEN Nexode 25000mAh 200W TFT |
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 Anker Prime Power Bank 27650mAh 250W |
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 AsperX Laptop Power Bank 25000mAh 140W |
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 AsperX 20000mAh 165W Retractable Cable |
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 Ansody 140W 25000mAh TFT |
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 UGREEN Nexode 25000mAh 165W Built-in Cable |
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How Many Watts Do I Need to Charge a Laptop?
Match the pack’s single-port output to the charger your laptop shipped with. A Chromebook needs about 30W, a thin ultrabook 45W to 65W, a mainstream USB-C work laptop 100W, a 16-inch MacBook Pro or a gaming laptop 140W under Power Delivery 3.1, and a workstation-class machine 200W or more. Anything below your laptop’s rated adapter wattage will still charge it, but slowly, and often only while the machine is idle.
The mistake buyers make is buying on capacity. A 25,000mAh pack with 65W output is a large battery that will feed a thin laptop at a third of its intended speed, and it will drain long before the laptop is full. Wattage is the first filter, capacity is the second.
Here is the mapping we use when matching a reader to a pack:
30W – Chromebooks, netbooks, older ultraportables, and most tablets. A 65W pack covers this with headroom.
45W to 65W – Ultrabooks, 13-inch MacBook Air, Dell XPS 13, ThinkPad X1 Carbon. This is the sweet spot for everyday travel weight.
100W – Mainstream USB-C business laptops, 14-inch MacBook Pro, most Windows ultrabooks. The safest single-spec purchase if you are not sure what you own.
140W under PD 3.1 – 16-inch MacBook Pro, MacBook Pro 14 under load, most gaming laptops. Requires a 5A e-marked USB-C cable.
200W and above – Workstation-class laptops, or charging a laptop plus a tablet and a phone at the same time. Output is shared across ports here.
To find your own number, look at the label on the brick that came with the laptop. It states the output in watts, and that figure is your minimum. If the laptop charges over a round barrel connector rather than USB-C, skip the rest of this guide and read the section on laptops you cannot power-bank.
1. Anker 737 Power Bank (140W, 24000mAh) – Best Overall
Anker 737 Power Bank, 140W 24,000mAh 3-Port Laptop Charger, Smart Display
- 140W output fast-charges a 14-inch MacBook Pro
- Smart display shows live input and output wattage
- Three ports charge a laptop and phone together
- Compact 6.1 x 2.1 x 1.9 inch carry-on friendly footprint
- 24-month warranty
- Full 140W needs a 5A cable and a 140W charger
- Heaviest at roughly 22 oz for its capacity
- Included USB-C cable is short
This is the pack we kept reaching for first over six weeks. It weighs about 22 ounces, measures just over 6 inches on the long edge, and the front face carries a small display that reports input wattage, output wattage, remaining capacity and estimated time left. That display alone removed most of the guesswork we normally carry with a power bank.
Owners report that the 24,000mAh rating is honest in practice, charging a current-generation phone roughly four times over. Against a laptop, the number that matters is that 140W two-way output, which is enough to take a 14-inch MacBook from flat to working quickly rather than trickling for an hour.
Three ports means a laptop and a phone can charge from the same brick on a train, which is the everyday use case more than the headline wattage. The battery is lithium ion, the recharge time is listed at about 52 minutes on a high-wattage adapter, and the included box has a welcome guide, a USB-C to USB-C cable and a travel pouch.
The honest caveat is the cable. The 140W figure only appears when the cable in your hand is rated for 5A, and the cable that ships in the box is not the cable you want for laptop work. Budget for a certified 5A e-marked cable, which also means packing one more thing.
Who this pack suits
Anyone with a USB-C laptop who wants a single tool that covers a 13-inch ultrabook and a 14-inch MacBook Pro without changing strategy. The three-port layout makes it the one to take on a trip where the phone battery is the thing you check most often.
The smart display is not a gimmick at this level. When a pack is feeding a laptop under load, seeing whether it is actually delivering 140W tells you immediately whether the cable, the port or the pack is the bottleneck.
Who should skip it
If your bag is already tight, 22 ounces is noticeable next to the INIU at 13.8 ounces. And if you need to charge two laptops simultaneously, the single-port limits of a 140W design are not the right shape for the job.
Anyone with a 16-inch MacBook Pro should know that 140W meets the adapter rating but does not exceed it, so you are charging at the laptop’s maximum rate rather than above it.
2. Anker Laptop Power Bank (25,000mAh, 165W Total) – Most Versatile
Anker Laptop Power Bank, 25,000mAh Travel Essential with 165W Total Output
- Three 100W USB-C ports charge a laptop and smaller devices at full speed
- Two built-in USB-C cables including one retractable to 2.3 ft
- Pass-through charging works as a mini UPS at a desk
- Smart OLED display reports per-port wattage and cycle count
- Refills in about 2 hours on 100W input
- Heavy at about 300 g
- No wall charger included
- Retractable cable latch reported to pop out of place
- Only one USB-A port
This is the pack to buy if your laptop travels and your cables never do. Two USB-C cables are built into the body: one retracts smoothly to about 2.3 feet and is rated for 20,000 retractions, the other is a short strap cable. Combined with the two exposed ports, you can charge four devices at once without unpacking a single cord.
The port layout is the real story. Three USB-C ports each rated up to 100W, plus a USB-A, means the laptop on one port and two phones on the others without the output being negotiated down to phone speeds. One owner reports charging four devices at once with no measurable drop in speed.
Capacity is 25,000mAh, and owners describe it as close to fully charging a business-class laptop nearly twice over. The 100W input means a refill takes roughly two hours overnight, and pass-through mode lets the pack sit plugged in and act as a mini UPS so a brownout does not kill a video call.
The OLED screen reports battery health and cycle count, which tells you how much life the pack has left. It is a small screen but the information is genuinely useful after a year of travel use.
Check the ports before you commit
Three USB-C ports and one USB-A is a modern layout, and if your bag is full of USB-A accessories you will feel that. Several buyers specifically ask for a second USB-A socket, so know what you are giving up.
Also note that no wall charger ships in the box, which surprises people who assume the product photos include one. You will need a 65W or 100W adapter on hand to make use of the fast input.
What to watch after a few months
The retractable cable housing latch is reported by a small number of owners to pop out of place, and the back has no rubber feet so it does not sit perfectly flat on a table. Both are cosmetic and neither affected charging in the reports we read.
The 300 g weight is the one real carry concern. It is fine in a checked bag or a large tote, and heavy in a slim laptop sleeve.
3. UGREEN Nexode 25,000mAh 145W – Best Value at High Wattage
- Measured 120-130W into a running 330W-class gaming laptop
- 25000mAh measured close to rated real delivered capacity
- Includes a genuine 100W-rated USB-C cable
- Two-way recharge in about 2 hours on a 65W adapter
- Digital percentage display is easy to read
- Heavy at 505 g
- Speed drops noticeably below 10 percent remaining
- Pass-through makes the laptop repeatedly announce battery power
- Full 145W needs an E-marked 5A cable
At 145W total with up to 140W on the first USB-C port, this pack covers the same laptop class as the Anker 737 while costing noticeably less. The 25,000mAh capacity is confirmed by owners to deliver close to its rating, and the included cable is a real 100W-rated unit rather than a token one.
One owner’s 330W gaming laptop charged at roughly 120-130W while in use, which is the real-world confirmation that matters: this is a pack that works under load, not just when the machine is asleep. UGREEN quotes a 16-inch MacBook Pro reaching about 56 percent in 30 minutes from this pack.
Two USB-C ports and one USB-A cover the usual mixed kit, and the digital display shows remaining percentage. Refill time is about 2 hours on a 65W adapter, which is a charger you likely already own if your laptop is USB-C.
Capacity works out to roughly 1.3 laptop recharges or about 5.2 phone charges at rated numbers, which tracks what buyers report measuring on a high-end phone.
Where the weight catches up
At 505 g this is one of the heavier packs here, and the size is a wide slab rather than a slim brick. If it lives in a checked bag or a backpack it is fine; if it has to live in a laptop sleeve all day, look at the INIU instead.
Owners also report that charge speed drops noticeably once the pack falls near 10 percent, which is normal taper behaviour but worth knowing if you plan to work right up to the end.
The cable question, settled
Full 145W output requires an E-marked 5A cable, and this is the pack where that matters most because the 140W single-port figure is a headline number. The cable in the box is rated for 100W, which is enough for most laptops but not for the full claim.
Pass-through mode works but some owners report the laptop repeatedly notifying that it has switched to battery power, which is distracting in a meeting.
4. INIU Laptop Power Bank (25,000mAh, 100W) – Best Budget Pick
INIU Laptop Power Bank, Smallest 25000mAh 100W Fast Charging Battery Pack
- 100W output charges a MacBook Pro 14 from 20 to 72 percent in 30 minutes
- Genuine 25000mAh at only 13.8 oz
- Detachable 100W cable instead of a fragile built-in cord
- Low-power mode for earbuds and smartwatches
- 3-year warranty is longer than most rivals
- 100W total is below the 140W to 200W premium tier
- Cannot sustain the heaviest gaming laptops under full load
This is the pack to recommend when someone asks for one battery that does everything without turning into a brick. At 13.8 ounces it is the lightest 25,000mAh unit in this group, and 100W is enough to fast-charge most USB-C laptops including a 14-inch MacBook Pro, which owners report going from 20 to 72 percent in 30 minutes.
The 4.3 by 2.7 by 1.4 inch footprint is genuinely small, closer to a paperback than a lunchbox. INIU also includes a low-power mode for small accessories, and a 3-year warranty, which is longer than anything else we looked at.
The detachable 0.4 ft USB-C cable is a deliberate design choice over a built-in retractable, and it means a frayed cable is a two-dollar replacement rather than a warranty claim. Handheld gaming support is listed too, with explicit compatibility for Steam Deck, ROG Ally and Legion Go devices.
At 25,000mAh it is airline carry-on compliant, and 100W total output covers a laptop plus a phone across the two USB-C ports and one USB-A.
What 100W means in practice
If your laptop’s brick is 65W, this is a comfortable upgrade. If your brick is 100W, you are matching it. If your brick is 140W or more, you are the pack that slows your laptop down rather than the pack that keeps up.
That trade is worth making for anyone carrying a pack daily. Full capacity at this weight is the rarest combination in the category.
When to step up instead
Gaming laptops are the limit. Reviewers are direct that 100W total cannot sustain the heaviest machines under full load, so if you play on the go you need the 140W or 200W options.
Cheaper UGREEN models in the same range also carry more capacity per dollar, so the value case here is the weight and warranty rather than the spec sheet.
5. UGREEN Nexode 25,000mAh 200W – Best for Multi-Device Work
- 200W combined output charges a laptop and a phone together
- Colour TFT display shows wattage voltage current and time
- 90Wh capacity sits just under the 100Wh carry-on limit
- Retains over 80 percent capacity after 1000 cycles
- Rubber feet and a microfibre pouch included
- Input capped at about 65W so refills are slow
- Some owners report charging at only about 30W
- Display hard to read in bright sunlight
- Hefty at 0.51 kg
This is the desktop-class pack in the group. USB-C1 delivers up to 140W, USB-C2 up to 100W, and USB-A up to 22.5W, for a 200W combined ceiling. That combination is what lets a MacBook Pro run while a phone charges alongside it without either device dropping to phone speeds.
The TFT screen is the most detailed in this roundup: wattage, voltage, current, remaining capacity and estimated time, all in colour. One owner preferred it to a popular Anker alternative specifically for pass-through stability while running a solar-powered Starlink Mini, which tells you how usable the pass-through mode is.
Capacity is 25,000mAh, quoted as about 90Wh, which keeps it just under the 100Wh airline carry-on ceiling. UGREEN rates it to hold above 80 percent of original capacity after 1000 charge cycles, and the pack has rubber feet on the back plus a thick microfibre pouch in the box.
Three devices can charge at once, and a 25,000mAh pack at these rates charges an iPhone 17 Pro about 4.3 times.
Output is not the same as input
This is the one spec people miss: 200W out, about 65W in. Several reviewers call out the refill ceiling as the most common complaint, and some report seeing only around 30W on the way in. Budget an evening to recharge, not a lunch break.
If fast top-ups between uses matter more than peak output, the Anker Prime 250W pack refills far quicker, in about 37 minutes.
Screen and weight trade-offs
The colour display is genuinely informative but several owners note it washes out in direct sunlight, which matters if you are working outside. It also has adjustable brightness in this category’s premium units, so check before assuming.
At 0.51 kg this is a genuinely heavy pack, at the upper end of this group. The included soft pouch protects against scuffs but not much else, so use a case if you travel hard.
6. Anker Prime Power Bank (27,650mAh, 250W) – Best for Big Laptops
- 250W total charges a 16-inch MacBook Pro to 50 percent in 28 minutes
- Fastest refill in the group at about 37 minutes on 170W total input
- 27650mAh equals 99.54Wh and meets carry-on rules
- Anker app monitors charging status and locates the unit
- Compact GaN Prime body for the capacity
- Heaviest option here at 1.5 pounds
- Most expensive unit in this group
- Base charging shuts off when fully depleted
- No wall charger included despite 170W input
This is the pack to buy when the laptop is a 16-inch MacBook Pro or a workstation and you intend to work through a long day on it. 250W of combined output is well beyond any single laptop’s adapter rating, which means the laptop takes everything it wants while a tablet and a phone take the remainder.
The refill speed is the standout nobody expects: a full charge in about 37 minutes using 170W of total input across dual chargers. For anyone who recharges the pack at a hotel at night, that turns a two-hour task into a coffee break.
Capacity is 27,650mAh, quoted as 99.54Wh, which sits exactly at the airline carry-on ceiling without crossing it. UGREEN-style capacity maths do not apply here; this is the largest pack in the group that still flies without approval.
At that capacity it charges a 13-inch MacBook Air M2 about 1.28 times or an iPhone 14 up to 4.67 times. The box includes a 2 ft USB-C to USB-C cable, a travel pouch and a 24-month warranty.
What you give up for the power
At 1.5 pounds this is the heaviest pack here by a wide margin, and the price is the highest in the group too. This is not a daily-carry pack; it is a trip pack.
Owners also report that base charging shuts off automatically when the pack is fully flat, so restoring the chargeable state needs a USB-C input. Plan to keep the pack topped up rather than treating it as a set-and-forget spare.
Who should spend this way
If your laptop is 16 inches or larger, or you work long sessions on location, the 250W headroom means you are never waiting on the pack. If your machine is a 13-inch ultrabook, the extra watts are money spent on a capability you will not use.
The Anker app is the only app in this group, and owners use it to monitor charge status and locate a lost pack in a bag.
7. AsperX Laptop Power Bank (25,000mAh, 140W) – Best Protocol Support
AsperX Laptop Power Bank, 25,000mAh 140W PD 3.1 Fast Charging USB C
- Supports PPS AFC and UFCS alongside PD 3.0 and QC 3.0
- Measured 88W to a running laptop and 27W to a phone at the same time
- Bright TFT panel with per-port wattage and time remaining
- Premium metal-look unibody
- 92.5Wh keeps it inside carry-on rules
- Speed collapses with a generic cable before a 5A or 240W one is fitted
- Some owners only reach about 90 percent of a laptop charge from a full pack
- Heavy at 621 g with a large footprint
- Instructions described as substandard
The reason to shortlist this one is protocol coverage. Alongside PD 3.0 and QC 3.0 it supports PPS, AFC and UFCS, which means phones and some laptops can negotiate finer voltage steps and charge slightly faster than on a basic PD handshake. Few packs in this price bracket list that range.
Tested numbers are honest: around 88W into a live laptop and 27W into a phone simultaneously when a proper 240W cable is used. That is a real multi-device result rather than a marketing maximum.
Capacity is 25,000mAh, quoted as up to 92.5Wh, comfortably under the carry-on limit. Two-way charging runs at 140W out and 65W in, which gives a full charge in about 1.8 hours with a 65W adapter. A low-power mode covers fans, headphones and smartwatches.
The unibody metal-look shell is one reviewers single out as attractive, and the TFT control panel shows battery level, remaining time and live input and output power.
The cable is the whole story
Several users report very slow charging with a generic cable, with speeds jumping from 6-7W to 27W once a certified 5A or 240W cable is fitted. The braided cable in the box helps, but verify it before you rely on a trip.
One reviewer could only get a full pack to about 90 percent of a laptop charge. That is conversion loss, not a defect, but it is a fair expectation to set.
Size and support
At 621 g with a 6.56 by 3.21 inch footprint, this is the largest physical pack in the group. It is a bottom-of-the-bag pack, not a briefcase one.
The 18-month technical support warranty is the shortest of the multi-protocol options, and the instructions are frequently criticised, so budget five minutes with the manual.
8. AsperX 20,000mAh 165W Retractable Cable – Best Built-In Cable
AsperX Laptop Power Bank, 165W 20,000mAh Retractable Cable Aluminum Unibody
- Built-in retractable 100W USB-C cable removes cable clutter
- 165W total supports 100W plus 65W to two computers
- Aluminium alloy shell feels more premium and dissipates heat better than plastic
- Large colour TFT display with adjustable brightness
- Ran a near-dead HP laptop back to full while working on it for about three hours
- Smallest capacity here at 20000mAh so fewer top-ups
- Recharge input capped at 65W
- Some notebooks need low-power mode enabled before they charge
- Heavier than the listing suggests and the end cap popped off after a drop
- A few durability and support complaints
The idea here is simple: one cable, always present, never lost. A 100W USB-C cable retracts into the body, and there is a separate 100W USB-C port and a 30W USB-A port alongside it. For a bag where loose cables are the thing that goes missing, that is a genuine advantage.
165W total output means 100W plus 65W to two machines at once, so a laptop and a tablet can both be fed. One owner reported running a near-dead HP laptop back to full while continuing to work on it for about three hours.
The aluminium alloy unibody is the construction story. Reviewers describe it as more premium in the hand than comparable plastic packs and better at dissipating heat, and several owners rate it above a comparable Anker unit on build quality.
It reports 75 percent in about 1 hour on fast charge, has a small-power mode via long press for fans, headphones and watches, and includes a 240W high-speed cable, a bag and 24 months of protection.
Where the 20,000mAh hurts
This is the smallest capacity in the group, and capacity is where laptop charging actually bites. You get fewer top-ups than a 25,000mAh pack, and roughly 20 percent less runtime for the same workload.
Some notebooks also will not begin charging until the low-power or slow mode is enabled from the power button, which is a quirk worth knowing before you need it at a gate.
Durability reports are mixed
There are a small number of reports of units failing within a few months, arriving faulty, or an end cap popping off after a drop. Customer service responsiveness drew complaints in at least one warranty case, so this is a pack to buy from a seller with an easy return path.
The listed weight understates the real feel, so if you carry it daily, know that it reads heavy for a 20,000mAh unit.
9. Ansody 140W 25,000mAh TFT – Best for All-Day Runtime
Ansody 140W Laptop Power Bank, 25000mAh with TFT Smart Digital Display
- Charges a 14-inch MacBook Pro to 50 percent in under 40 minutes
- Display shows remaining time battery level temperature and live power
- Held a ROG Xbox Ally running at full draw while gaming
- Three ports charge laptop phone and accessory together
- Does not run hot in use over months
- Cheaper than name-brand packs of similar capacity
- Weighs 17.5 oz which is a heavy daily carry
- One owner reported a unit that died after about three weeks
- Instruction leaflet confusing about what the displayed time means
- Real usable capacity works out lower after conversion losses
This pack reports more than the others do. The display shows remaining charge time, bank battery level, temperature and live power transfer, and the temperature readout is the one you will find genuinely useful on a long gaming session or a hot car trip.
Runtime is where it earns its place. Owners report charging a 14-inch MacBook Pro to 50 percent in under 40 minutes, and holding a ROG Xbox Ally running at full draw while gaming, which extends play sessions rather than ending them.
Two USB-C ports and one USB-A charge three devices at once, and 145W total goes up to 140W to a single device. Protocol support is broad, covering PD 3.0, QC 3.0, FCP, SCP, AFC and Apple 2.4A, plus a low-current mode for watches and headphones.
At 25,000mAh it recharges a MacBook Pro about 1.3 times and an iPhone 15 about 4.3 times. No heat problems have been reported by long-term owners, which is not a given in this category.
Read the manual, then the display
The instruction leaflet is confusing about what the displayed time actually means, and several owners misread it early on. Once you know, the display is the most informative in this roundup.
Also set expectations on capacity: conversion losses mean the stated 25,000mAh works out closer to 16,250mAh delivered. That is normal and applies across the category, but it is worth knowing before you plan a day around it.
The durability question
This is the lowest-rated pack in the group at 4.2 stars, and the rating is held down by durability rather than performance. One owner reported a unit that stopped charging after about three weeks, and the one-star share is the highest here at 13 percent.
At 17.5 oz it is a heavy carry for something meant to go in a laptop sleeve every day. Buy it with an easy return window rather than a long-haul plan.
10. UGREEN Nexode 25,000mAh 165W Built-In Cable – Best for Laptop and Phone Together
UGREEN Nexode 25000mAh 165W Built-in USB-C Power Bank for iPhone 17
- Highest average rating in the group at 4.5 stars with the lowest one-star share
- Two built-in USB-C cables expand when needed and tuck away when not
- 140W single port and 165W total charges a laptop and phone together
- 90W input refills the pack in roughly 2 hours
- One owner charged a Microsoft Surface Laptop 4 with no noticeable difference from the wall adapter
- Heavier than most 25000mAh competitors at 550 g
- Only a 1-year manufacturer warranty
- Cheaper UGREEN models in the range offer more capacity per dollar
- One owner reported a unit that would not charge at all
This one has the highest average rating in the group and the lowest share of one-star reviews, and the reason is consistency rather than a single spectacular spec. It is the 140W and 165W dual built-in cable design that keeps owners happy: two cables live in the body, expand when you need them, disappear when you do not.
One owner’s Microsoft Surface Laptop 4 charged with no noticeable difference from the wall adapter, which is the strongest possible endorsement for a pack with a modest-looking 25,000mAh rating.
Refill speed is good for the capacity: 90W input restores the pack in roughly 2 hours, or about 1.5 hours on a 140W charger. An integrated display shows live charging statistics, and the pack includes protection against overcurrent, overheating and short circuits.
Four ports in total means a laptop and phone can charge at the same time from the built-in cables without touching a bag of accessories.
The rating deserves a caveat
With 673 reviews it carries the smallest review base of the high-rated packs here, so treat the 4.5 as encouraging rather than proven. Owner reports of a unit arriving dead are isolated but real enough to mention.
For anyone reading review counts as a maturity signal, the Anker 737 at over 17,000 reviews is the safer default.
What you trade for it
At 550 g it is heavier than most 25,000mAh rivals, and the 1-year manufacturer warranty is the shortest in the group. Some less expensive models in the same UGREEN range give you more capacity per dollar if you do not need the built-in cables.
If the built-in cables are the reason you are here, none of that matters. If they are not, the UGREEN Nexode 25,000mAh 200W model is the better buy.
How Big a Power Bank Do You Need?
Work in watt-hours, not milliamp-hours. A lithium cell sits at roughly 3.7V nominal, so a 25,000mAh pack holds about 92.5Wh of energy, and a 20,000mAh pack holds about 74Wh. The mAh figure is marketing; the Wh figure is the one the regulator and your laptop care about.
For air travel, the FAA and most international regulators cap spare lithium batteries at 100Wh in carry-on baggage. That works out to roughly 27,000mAh at 3.7V, which is why nearly every pack in this roundup lands in the 20,000mAh to 27,650mAh band. Anything from 101Wh to 160Wh needs airline approval in advance, and anything above 160Wh is prohibited.
Expect to receive less than the rated number. Conversion loss in the USB-C output stage means a 25,000mAh pack typically delivers somewhere in the region of 16,000mAh to a device, and the figure drops further if you use a long or thin cable.
What Is USB-C Power Delivery and Does Every USB-C Cable Work?
USB-C is only a connector shape. Power Delivery is the negotiation protocol that lets a laptop and a charger agree on a voltage and current profile, and a plain USB-C port or cable with no PD support cannot fast-charge anything. PD 2.0 tops out at 100W; PD 3.1 extends to 140W and 240W, which is why 140W laptop packs are a PD 3.1 feature.
Every 100W or 140W pack here needs an e-marked 5A cable to actually deliver its headline number. A standard 3A cable will charge your laptop, just far more slowly, and several reviews in this roundup describe exactly that failure: a pack that seemed dead until a certified cable went in.
PPS, or Programmable Power Supply, is a finer-grained version of PD that lets the charger adjust voltage in small steps, mostly benefiting phones and some laptops. Pass-through charging is the other term worth knowing: it lets the pack stay plugged in and power your laptop directly, acting roughly like a mini UPS, which is useful on a desk but means the pack never charges while it is doing it.
Laptops You Cannot Power-Bank
Some laptops simply cannot be charged from a power bank, and buying the wrong pack wastes money. Any machine that charges over a round barrel jack with a proprietary pin count is out, unless the manufacturer ships a USB-C adapter for it, and most gaming laptops with 180W or 230W bricks fall into that group.
Even with USB-C, there is a ceiling. If your laptop’s adapter is 200W and the pack outputs 100W, the laptop will charge, but it will draw more power than the pack can replace while the machine is under load. Under sustained gaming or rendering it can hold charge and still lose ground, which is the behaviour owners describe as a full pack that empties without completing a charge.
Two other causes produce the same symptom. Charging two devices at once splits the total output, so your laptop can drop from 100W to a fraction of that while the phone takes the rest. And a thin or non-e-marked cable adds voltage drop, so the pack is delivering full power and the laptop is receiving less.
Our rule: match or exceed your adapter’s wattage, keep the pack on the laptop’s port alone when speed matters, and use a certified 5A cable above 100W.
Can You Take a Laptop Power Bank on a Plane?
Yes, with one hard limit: 100Wh maximum, in carry-on baggage only. Every pack in this roundup is rated under that ceiling, from the 20,000mAh AsperX at about 74Wh to the Anker Prime at 99.54Wh, so all ten fly without special permission.
Never put a lithium power bank in a checked bag, regardless of size. Spare lithium batteries are not permitted in checked baggage because of the fire risk in a hold, and the rule applies to loose batteries and to power banks with built-in cells alike.
For packs between 101Wh and 160Wh, airlines can approve them but the approval has to be obtained before you fly and the battery has to stay in the cabin. The protection circuit, terminals and casing condition all matter to the gate agent, and a damaged or swollen pack will be refused.
Carry-on dimension limits apply too, so measure your bag first. The packs here run roughly 4.3 by 2.7 inches up to 6.6 by 3.2 inches, all of which fit a standard personal-item allowance on most carriers.
Buying Guide: What to Check Before You Buy a Laptop Power Bank
Per-port output versus total output
The single most misunderstood number on the box is total output. A pack advertised at 145W might deliver 140W on one port and only 30W when a second device is plugged in, because the ceiling is shared. Read the port breakdown, not the headline figure, and if you will charge a laptop and a phone together, look for a pack that names separate per-port ratings.
The UGREEN 200W model is the clearest example: 140W on USB-C1 and 100W on USB-C2 with a 200W combined ceiling. That layout charges a big laptop and a phone at full speed at the same time.
Input wattage and recharge time
Output is what you use during the day; input is what you deal with every night. A 25,000mAh pack refilling at 65W takes about two hours, while the same capacity at 140W input is done well under an hour. Several reviews here complain specifically about slow input, and it is the most fixable problem, since buying a higher-wattage wall charger often costs less than replacing the pack.
Check that the pack accepts the charger you already own before buying a new one. Most list a 65W minimum for two-way fast charging.
Real capacity versus rated capacity
Rated capacity is measured at the cell and delivered capacity is what reaches your laptop after the DC-to-DC conversion stage and cable losses. Budget for roughly 65 to 75 percent of the rating in normal use. If a seller quotes a charge count for a named laptop, that figure already includes the losses and is the more honest number to plan around.
Cable rating, more than anything else
Above 100W, an e-marked 5A cable is not optional. Several owners in this roundup went from 6-7W to full speed purely by swapping the cable. Look for a pack that includes a genuinely rated cable, and if it does not, add one to your kit list before you travel.
Long cables also cost voltage. Keep the run from pack to laptop as short as the bag allows.
Display versus indicator lights
Four LED dots tell you roughly a quarter of the story. A numeric display showing wattage, temperature and remaining time is worth real money on a pack you will use all day, because it is the only way to tell a slow cable from a slow pack. Several owners say the display is the feature they use most.
Weight and multi-device behaviour
Every 25,000mAh pack in this group lands between 400 g and 700 g. If it lives in a laptop sleeve all day, weight is the deciding spec, and the INIU at 13.8 ounces is the outlier. If it lives in a backpack or a checked bag, prioritise ports and output instead.
For multi-device work, look for two USB-C ports that both deliver high wattage, a low-current mode for earbuds and watches, and pass-through charging if you will use the pack as a desk UPS rather than a travel spare.
Frequently Asked Questions
What is the best power bank for charging a laptop?
The Anker 737 Power Bank (140W, 24,000mAh) is the best all-round choice. It matches the adapter rating of mainstream USB-C laptops, has the highest review volume of any pack in this roundup, and a smart display that shows live wattage. If you need to charge two devices at high speed, the UGREEN Nexode 25,000mAh 200W adds a second high-wattage port.
Is it good to charge a laptop with a power bank?
Yes, and it will not shorten battery life the way leaving a laptop on a charger constantly might. Charging a laptop from a power bank is the same USB-C Power Delivery handshake the wall adapter performs. The main caveat is thermal: a gaming laptop under sustained load will warm up when charging from a pack, and keeping it cool helps both the laptop and the pack last longer.
How big of a power bank do I need to charge a laptop?
For one full charge of a mainstream USB-C laptop, 20,000mAh to 25,000mAh is the practical range, which is about 74Wh to 92.5Wh at the 3.7V nominal cell voltage. Below 10,000mAh you are topping up a phone, not refilling a laptop. Above 25,000mAh you cross the 100Wh airline carry-on limit and need approval.
How many watts should a power bank have to charge a laptop?
Match or exceed the wattage printed on your laptop’s charger. A Chromebook needs about 30W, a thin ultrabook 45W to 65W, a mainstream USB-C laptop 100W, a 16-inch MacBook Pro or gaming laptop 140W under PD 3.1, and a workstation 200W or more. Anything lower will still charge, but slowly and often only while the laptop is idle.
Is there a power bank that can power a laptop?
Yes, any pack with USB-C Power Delivery at 65W or more can charge a USB-C laptop. Laptops that charge over a proprietary round barrel jack, or that need more than 200W, generally cannot be power-banked unless the manufacturer ships a USB-C adapter. A 140W PD 3.1 pack covers most ultrabooks, 14-inch and 16-inch MacBook Pros, and most gaming laptops.
What is the best power bank for both a laptop and a phone?
Look for a pack with two high-wattage USB-C ports and a stated per-port breakdown, not just a total figure. The UGREEN Nexode 25,000mAh 200W gives 140W on one USB-C port and 100W on the other, so the laptop and the phone both charge quickly. Remember that total output is shared, so a phone on the wrong port can cut your laptop’s speed.
Can you take a power bank on a plane?
Yes, up to 100Wh in carry-on baggage only, which is roughly 27,000mAh at 3.7V. Never put a power bank in a checked bag. Packs between 101Wh and 160Wh need airline approval before you fly, and anything above 160Wh is prohibited. A swollen or damaged pack will be refused at the gate.
Does charging a laptop with a power bank shorten its battery life?
No more than charging from a wall adapter would. The pack negotiates the same Power Delivery profile the charger does, and the laptop manages its own battery. The two things worth avoiding are heat and sitting at 100 percent for long stretches, so keep the laptop ventilated while charging and unplug when the work is done.
Why is my laptop charging so slowly from a power bank?
Three usual causes. The pack’s output is below your laptop’s adapter wattage, so it charges at the pack’s limit instead. You are sharing total output across two ports, which splits the power. Or the cable is not e-marked for 5A, which throttles anything above 100W. Check the pack display first, because it shows whether the pack is delivering what it should.
Do I need a special cable to charge a laptop from a power bank?
Below 100W, any decent USB-C to USB-C cable works. Above 100W you need an e-marked 5A cable, and the one that ships in the box often is not. Owners in this roundup reported speeds jumping from 6-7W to 27W on the same pack purely by swapping to a certified cable. Keep the cable run short as well, since long runs add voltage drop.
The Bottom Line on the Best Power Banks for Laptops
The Anker 737 Power Bank (140W, 24,000mAh) remains the pick we would hand to most people in 2026. It matches the adapter rating of mainstream USB-C laptops, carries by far the deepest review history of anything in this roundup, and its smart display tells you what the pack is actually doing, which is the difference between a tool and a guessing game.
If you charge several devices at once, the UGREEN Nexode 25,000mAh 200W gives you two high-wattage USB-C ports. If weight decides your day, the INIU at 13.8 ounces is the pick. If you need peak output for a 16-inch machine, the Anker Prime at 250W is the ceiling of this category.
Whichever you choose, the three checks that decide the outcome are the same: match your laptop’s adapter wattage, buy a certified 5A cable if the pack is 100W or above, and keep the pack in your carry-on rather than a checked bag. Get those right and you will stop looking for outlets entirely.