Best Power Bank (2026): 8 Picks for Phones, Laptops, Travel
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Quick answer
The Anker 737 Power Bank (PowerCore 24K) is the best all-around power bank, with 140W output strong enough for most laptops. For a lighter, cheaper laptop-capable option, the UGREEN Nexode 20,000mAh is the better value, and for multi-day trips the Anker Prime 27,650mAh holds the most usable energy while still fitting airline carry-on rules.
A power bank is only as good as the energy that actually reaches your phone or laptop, and that number is almost always lower than the mAh printed on the box. Capacity, output wattage and port selection all matter more than the headline mAh figure once you're trying to charge a laptop, fly with one, or just get through a long day away from an outlet.
We compared manufacturer specs, owner reviews and a few independent lab tests for eight current power banks, covering everything from slim built-in-cable packs to high-capacity bricks that can keep a laptop running. We also checked each brand's recall history where it was relevant, since lithium battery safety has been a real issue in this category recently.
Below are our eight picks, followed by a buying guide covering mAh vs. watt-hours, flying with a power bank, and how many real phone charges you actually get.
Our Top Picks
Anker 737 Power Bank (PowerCore 24K)7.6/10
A 24,000mAh bank with 140W output, strong enough to charge most laptops, plus a smart display that shows input/output wattage and estimated recharge time.
Read our full take ↓UGREEN Nexode 20,000mAh7.6/10
A 130W, 20,000mAh (72Wh) bank with a smart TFT display and automotive-grade cells, lighter than the Anker 737 at a similar capacity tier.
Read our full take ↓Anker Prime Power Bank (27,650mAh, 250W)7.5/10
Anker's highest-capacity pick here, with a 99.54Wh rating that stays just under the TSA's 100Wh carry-on limit, plus 250W output across three ports.
Read our full take ↓- Anker 737 Power Bank (PowerCore 24K)Best Overall7.6
- UGREEN Nexode 20,000mAhRunner-Up7.6
- Anker Prime Power Bank (27,650mAh, 250W)Best for Multi-Day Trips7.5
- Anker Nano Power Bank (10,000mAh, Built-In USB-C Cable)Best Slim Built-In Cable6.8
- Belkin BoostCharge Pro Qi2 MagSafe Power Bank 10KBest MagSafe-Style Pick6.3
- UGREEN Nexode 12,000mAh (Smart Display)Best Display / Percentage Readout7.0
- Belkin BoostCharge Power Bank 20KBest for Basic, Multi-Device Charging5.9
- INIU Portable Charger (10,000mAh, 22.5W)Best Budget7.3
| Product | Our score | Best for | Price |
|---|---|---|---|
| Best Overall Anker 737 Power Bank (PowerCore 24K) | 7.6 | Anyone who wants one power bank that can also top up a laptop | Photos & price on Amazon |
| Runner-Up UGREEN Nexode 20,000mAh | 7.6 | Buyers who want laptop-capable output without the Anker 737's bulk | Photos & price on Amazon |
| Best for Multi-Day Trips Anker Prime Power Bank (27,650mAh, 250W) | 7.5 | Multi-day travelers who want to charge a laptop, tablet and phone without a wall outlet | Photos & price on Amazon |
| Best Slim Built-In Cable Anker Nano Power Bank (10,000mAh, Built-In USB-C Cable) | 6.8 | Phone and tablet charging on the go without carrying a separate cable | Photos & price on Amazon |
| Best MagSafe-Style Pick Belkin BoostCharge Pro Qi2 MagSafe Power Bank 10K | 6.3 | iPhone and Qi2-compatible Android owners who want cable-free magnetic charging with a stand | Photos & price on Amazon |
| Best Display / Percentage Readout UGREEN Nexode 12,000mAh (Smart Display) | 7.0 | Buyers who want to glance at an exact charge readout instead of guessing from LED dots | Photos & price on Amazon |
| Best for Basic, Multi-Device Charging Belkin BoostCharge Power Bank 20K | 5.9 | Buyers who want a large-capacity bank for everyday devices that don't need fast charging | Photos & price on Amazon |
| Best Budget INIU Portable Charger (10,000mAh, 22.5W) | 7.3 | Budget shoppers who want a small, light everyday phone charger | Photos & price on Amazon |
1. Anker 737 Power Bank (PowerCore 24K) — Best Overall
- 140W Max Output
- 24,000mAh Capacity
- Smart Digital Display
What we like
- 140W max output over USB-C (PD 3.1) is enough to charge many laptops, not just phones and tablets
- Three ports (2x USB-C, 1x USB-A) let you charge multiple devices
- Smart display shows live input/output wattage and an estimated recharge time, per Anker's own listing
- Still sold directly on anker.com, confirming it isn't discontinued
Keep in mind
- At 630g (about 22.2oz), it's noticeably heavier than the slimmer picks on this list
- Anker doesn't clearly document reliable pass-through charging (charging the bank and a device at once from one outlet), so don't count on it
- Ships without a 140W cable included for every bundle; check the listing for what's included
The 737 is Anker's answer to "one bank that can do almost everything." Anker's own product page lists a 24,000mAh capacity and 140W max output over USB-C with PD 3.1, which is enough headroom to charge many USB-C laptops, not just top up a phone. It weighs 630g per Anker's spec sheet, and the smart display shows real-time input and output wattage along with an estimated time to full recharge.
The trade-off for that laptop-level output is bulk: at 630g, it's among the heaviest banks in this guide, more of a bag item than a pocket one. Anker also doesn't clearly document simultaneous pass-through charging (using the bank to charge a device while it's also plugged into the wall), and online reports on the Amazon Q&A section note it isn't reliable for that use case, so plan to charge the bank separately rather than relying on it as a travel power strip.
For most people who want one power bank that covers phones, tablets and a laptop in a pinch, it's the strongest all-around choice here.
Skip it if you want something pocket-sized; the Anker Nano or INIU picks below are much lighter.
2. UGREEN Nexode 20,000mAh — Runner-Up
- 130W Max Output
- 72Wh (UGREEN-Published)
- 476g, Lighter Than 737
Best for: Buyers who want laptop-capable output without the Anker 737's bulk
What we like
- UGREEN directly publishes a 72Wh rating alongside the 20,000mAh figure, more transparent than brands that only list mAh
- Up to 100W on the primary USB-C port, enough for many laptops
- 476g, notably lighter than the Anker 737 at a similar capacity class
- Uses automotive-grade 21700 cells UGREEN rates for 1,000 charge cycles to 80%+ capacity
Keep in mind
- Parkablogs' hands-on review found it can't charge another device while it's being recharged itself, so don't count on pass-through
- The Gadgeteer's review of a related retractable-cable Nexode model measured real usable capacity closer to 11,600mAh of the 20,000mAh rating
- No US-specific UGREEN product page was found; US buyers should confirm specs against the Amazon listing
UGREEN is more transparent than most competitors about energy content: its own spec table lists this bank at 20,000mAh and 72Wh directly, rather than leaving you to estimate the watt-hours yourself. It outputs up to 130W total, with up to 100W available on the primary USB-C port, enough for many laptops, and a built-in TFT display shows battery percentage, wattage, voltage and current. At 476g, it's meaningfully lighter than the Anker 737 above.
Parkablogs' hands-on review found a real limitation: you can't charge another device from this bank while it's plugged in and recharging itself, so treat it as charge-then-use rather than a pass-through hub. The Gadgeteer's review of a related retractable-cable Nexode model measured real delivered capacity closer to 11,600mAh of the rated 20,000mAh, in line with the conversion losses common across this whole category.
For most buyers who want laptop-capable charging without the heaviest option on this list, it's the better value.
Skip it if you need to charge the bank and a device simultaneously from one outlet; neither this nor the Anker 737 reliably supports that.
3. Anker Prime Power Bank (27,650mAh, 250W) — Best for Multi-Day Trips
- 99.54Wh, Under TSA's 100Wh Limit
- 250W Across 3 Ports
- Bluetooth App Monitoring
Best for: Multi-day travelers who want to charge a laptop, tablet and phone without a wall outlet
What we like
- 27,650mAh / 99.54Wh is the largest usable capacity in this guide, and Macworld's review confirms that figure stays within TSA, CAA and EASA carry-on limits
- 250W total output across 2x USB-C and 1x USB-A, enough to run a laptop, tablet and phone at once
- Bluetooth app support lets you monitor charge status from your phone
- Has a built-in display for charge status
Keep in mind
- At roughly 660g (about 1.45 lb), it's a noticeably heavy, bag-only item
- Macworld and Android Central reviews both flag the size and weight as the main downside for everyday carry
- Android Central notes the magnetic charging base shown in some marketing is sold separately from the power bank itself
The Prime is Anker's premium, go-big pick, and the number that matters most here is 99.54Wh, a figure independently confirmed by Macworld's review and multiple retailers. That's useful because it lands just under the TSA's 100 watt-hour threshold for carry-on lithium batteries without airline approval, making this one of the highest-capacity banks you can still fly with freely. Anker rates total output at 250W across three ports, enough to run a laptop, tablet and phone from the same bank.
The cost of that capacity is bulk. Macworld's review measured it at about 659g, and pickr.com.au's review measured it close to that at about 667g; either way, both reviews single out the size and weight as the main complaint for anyone hoping to carry it daily. Android Central's review notes it's priced at Anker's premium tier, and that the magnetic charging base shown in some marketing is sold separately.
For trips where you genuinely need multiple days of charging away from an outlet, it earns the extra bulk.
Skip it if you want something for daily commuting; the UGREEN Nexode 20,000mAh above or the Anker Nano below are far easier to carry every day.
4. Anker Nano Power Bank (10,000mAh, Built-In USB-C Cable) — Best Slim Built-In Cable
- Built-In USB-C Cable
- 7.58oz, Pocket-Sized
- 30W Max Output
Best for: Phone and tablet charging on the go without carrying a separate cable
What we like
- Built-in USB-C cable means one less cable to remember or lose
- At 7.58oz (about 215g), it's genuinely pocket-sized
- Recharges to 50% in about 45 minutes, per Anker's listing
- Color screen shows charge status at a glance
Keep in mind
- 30W max output is enough for phones and tablets but not a laptop
- TechRadar's review of a related retractable-cable Nano model found output throttles down from thermal limits, so don't expect sustained peak speed
- A built-in cable is a single point of failure; several reviewers note it can loosen or break with heavy use, and the bank loses most of its function if that happens
Anker sells several different products under the "Nano" name, so it's worth confirming you're looking at the 10,000mAh version with a built-in USB-C cable specifically. That built-in cable is the whole pitch: no separate cable to pack or lose. Anker's listing rates it at 30W max output and 7.58oz (about 215g), recharging to 50% in roughly 45 minutes.
The 30W ceiling means it's built for phones and tablets, not laptops, and TechRadar's review of a related retractable-cable Nano model found real-world output throttles down from thermal limits during sustained use. The bigger long-term concern, raised by multiple reviewers of built-in-cable power banks generally, is durability: the cable connector is a single point of failure, and if it loosens or breaks, you lose most of the bank's usefulness.
For light daily carry where convenience matters more than raw power, it's a smart, pocketable pick.
Skip it if you're hard on your gear or need laptop-level output; the Anker 737 or UGREEN Nexode 20,000mAh above are the better fit.
5. Belkin BoostCharge Pro Qi2 MagSafe Power Bank 10K — Best MagSafe-Style Pick
- Qi2 Magnetic Charging
- Built-In Kickstand
- 10,000mAh Capacity
Best for: iPhone and Qi2-compatible Android owners who want cable-free magnetic charging with a stand
What we like
- Qi2 magnetic alignment snaps securely onto a Qi2-compatible phone without a cable
- Built-in kickstand props the phone up for video calls or watching content while it charges
- Also has wired USB-C ports if you want faster charging than wireless allows
- Model BPD008 is a different product from Belkin's recalled BPD005 Apple Watch-charger power bank
Keep in mind
- Belkin's own listing text is inconsistent on wireless wattage, citing both 15W and a 7.5W wireless / 10W USB-C breakdown, so confirm the exact number on Belkin's site before expecting a specific speed
- Wireless charging on magnetic banks is generally slower than wired charging, regardless of brand
- Belkin has recalled two other power bank-related product lines since 2024 for lithium-cell overheating risk (see our safety note below); this model isn't part of either recall, but it's worth knowing the brand's recent history
This is Belkin's magnetic, Qi2-based answer to MagSafe-style charging: the bank snaps onto a Qi2-compatible iPhone or Android phone and props it up on a built-in kickstand, no cable needed. Belkin's listing names this model BPD008, distinct from the BPD005 Apple Watch-charger power bank Belkin recalled for a lithium-cell fire risk. It has a 10,000mAh capacity and also includes wired USB-C ports for faster charging than the wireless pad alone provides.
Belkin's own marketing is inconsistent about the exact wireless wattage, with some listing text citing 15W and other sections breaking it down as 7.5W wireless plus 10W wired, so treat any specific speed claim with some caution until you check Belkin's current page. As with magnetic chargers generally, expect wireless charging here to be slower than a wired connection on any of the other picks in this guide.
For the convenience of cable-free charging with a stand, it's a solid option if your phone supports Qi2.
Skip it if you want the fastest possible charge or your phone isn't Qi2-compatible; a wired pick like the Anker Nano above will charge faster.
6. UGREEN Nexode 12,000mAh (Smart Display) — Best Display / Percentage Readout
- 12,000mAh Capacity
- 100W Max Output
- Smart Display Readout
Best for: Buyers who want to glance at an exact charge readout instead of guessing from LED dots
What we like
- 100W max output (PPS range of 3.3 to 21V/5A, per the listing) is strong for its size
- Smart display shows charge status at a glance instead of relying on LED dots
- 65W input means a relatively fast recharge, about 1.5 hours per UGREEN's claim
Keep in mind
- TechRadar's review found the capacity isn't large enough to sustain multiple full phone charges
- Only two ports (1x USB-C, 1x USB-A) limits how many devices you can charge at once
- TechRadar also described the chassis as feeling a little flimsy for the price
This smaller Nexode model trades capacity for a clear display and fast charging in a compact size. UGREEN's listing gives a 12,000mAh capacity, 100W max output, and a smart display showing charge status rather than the vague LED-dot indicators common on cheaper banks. A 65W input means it can recharge in about 1.5 hours by UGREEN's own claim. (UGREEN's own listing shows conflicting watt-hour figures for this model, so we're not stating one here; the mAh and wattage figures above are consistent across sources.)
TechRadar's hands-on review is the most useful independent check here, and it's mixed: the reviewer liked the fast charging and display but found the 12,000mAh capacity isn't enough to sustain repeated full charges, and felt the chassis build quality was a little flimsy given the price. With only two ports, it's also more limited than the pricier picks above if you need to charge several devices at once.
If a clear charge readout and compact size matter more to you than maximum capacity, it's worth considering.
Skip it if you need to charge more than one or two devices at a time, or want the largest possible capacity; the UGREEN Nexode 20,000mAh above holds much more energy.
7. Belkin BoostCharge Power Bank 20K — Best for Basic, Multi-Device Charging
- 20,000mAh Capacity
- 3 Ports (1 USB-C, 2 USB-A)
- No Fast Charging
Best for: Buyers who want a large-capacity bank for everyday devices that don't need fast charging
What we like
- 20,000mAh capacity in a bank with three ports (1x USB-C, 2x USB-A) for charging multiple devices
- Backed by Belkin's 2-year warranty plus its Connected Equipment Warranty
- Model BPB012 is not part of Belkin's 2024-2025 power bank recalls (see our safety note below)
- Straightforward design with no app or Bluetooth to set up
Keep in mind
- Belkin's own product page explicitly states this model does not support fast charging, capped at 15W total on USB-C and 12W per USB-A port
- At about 1.08 lb (0.49kg), it's heavier than several faster-charging picks on this list
- An Amazon buyer reported that plugging a USB-C wall adapter directly into the bank's USB-C port didn't work; a USB-A-to-USB-C cable is the documented way to charge it
Belkin is explicit on this one: its own product listing states plainly that this model does not support fast charging, with output capped at 15W total on the USB-C port and 12W on each USB-A port. That makes it a poor fit if you want to minimize charging time, but it's a reasonable choice if you mostly need to top off basic devices like older phones, lights, or small electronics where charging speed isn't the priority.
It holds a 20,000mAh capacity across three ports (one USB-C, two USB-A), backed by Belkin's 2-year warranty and its Connected Equipment Warranty. Before buying any Belkin power bank, know the brand's recent history: it recalled its BPD005 Apple Watch-charger power bank and separately its BPB002/PB0003 power banks and MMA008 charging stand in 2024 and 2025 for lithium-cell overheating risk, per CPSC notices. This specific model, BPB012, is not named in either recall.
For simple, no-frills charging of devices that don't need speed, it does the job.
Skip it if you want fast charging for a modern phone; the Anker 737 or UGREEN Nexode 20,000mAh above charge far quicker.
8. INIU Portable Charger (10,000mAh, 22.5W) — Best Budget
- 195.6g, Very Light
- 22.5W Fast Charging
- 3-Year Warranty Claimed
Best for: Budget shoppers who want a small, light everyday phone charger
What we like
- At 195.6g per INIU's own spec, it's one of the lightest banks in this guide
- 22.5W output with PD 3.0 and QC 4+ support covers fast charging for most phones
- INIU claims a 3-year warranty, longer than many rivals
- Noticeably cheaper than the Pro-tier picks above
Keep in mind
- INIU sells many similarly-named 10,000mAh models, so double-check the exact listing matches 22.5W and PD 3.0 before buying
- A Slickdeals-referenced capacity test found one unit delivered as little as roughly 5,146mAh of usable charge from its 10,000mAh rating, though an independent test of a larger 25,000mAh INIU model measured 88 to 91% efficiency, so results appear to vary by unit or capacity
- 22.5W is fine for phones but not enough for laptop charging
INIU built its reputation on small, light, inexpensive power banks, and this 10,000mAh model fits that pattern at 195.6g per the company's own spec sheet, among the lightest banks in this entire guide. It supports 22.5W output with both PD 3.0 and Quick Charge 4+, which covers fast charging on most current phones, and INIU claims a 3-year warranty.
The brand sells several similarly named 10,000mAh models with different wattages, so it's worth confirming the specific listing matches 22.5W and PD 3.0 before ordering. Real-world capacity testing is mixed: a test referenced on Slickdeals found one unit delivering as little as about 5,146mAh of its rated 10,000mAh, while an independent test of a larger, 25,000mAh INIU model measured 88 to 91% efficiency, suggesting results vary by specific unit or capacity rather than pointing to one clear number for the whole brand.
For a cheap, light, everyday phone charger, it's a sensible starting point.
Skip it if you want to charge a laptop or need guaranteed consistent capacity; the Pro-tier picks above are more predictable.
How We Chose
We compared manufacturer specs, owner reviews and independent reviews from outlets like TechRadar, Macworld and The Gadgeteer for eight current power banks covering a range of capacities and use cases. We prioritized manufacturer-published watt-hour (Wh) figures over mAh alone where available, since Wh is what airlines actually regulate, and we checked each brand’s recent recall history given real lithium battery safety issues in this category.
Our main criteria were charging speed (output wattage), usable capacity, portability, and overall value. If you’re shopping for someone else, a power bank also makes a solid add-on gift; see our gifts for people who work from home, tech gifts under $50 and tech gifts under $100 guides for more ideas, or our stocking stuffers for adults picks for a smaller option.
Key Specs Side by Side
Here’s how the eight power banks compare on the specs that matter most, taken from manufacturer listings.
| Power bank | Capacity | Max output | Weight | Built-in cable |
|---|---|---|---|---|
| Anker 737 (PowerCore 24K) | 24,000mAh | 140W | 630g | No |
| UGREEN Nexode 20,000mAh | 20,000mAh (72Wh) | 130W | 476g | No |
| Anker Prime 27,650mAh | 27,650mAh (99.54Wh) | 250W | ~660g | No |
| Anker Nano 10,000mAh | 10,000mAh | 30W | 215g | Yes, USB-C |
| Belkin BoostCharge Pro Qi2 10K | 10,000mAh | 15W wireless / wired varies | ~210g (retailer listing) | No |
| UGREEN Nexode 12,000mAh | 12,000mAh | 100W | — | No |
| Belkin BoostCharge 20K | 20,000mAh | 15W, no fast charging | ~0.49kg | No |
| INIU 10,000mAh | 10,000mAh | 22.5W | 195.6g | No |
Write a dash when a manufacturer doesn’t publish a figure. The Anker Prime holds the most usable energy and the highest total output (250W across three ports), though the Anker 737 (140W) and UGREEN Nexode 20,000mAh (100W) deliver more power through a single USB-C port, which matters more for charging one laptop. The INIU pick is the lightest overall, with the Belkin Qi2 10K and Anker Nano close behind.
mAh vs. Watt-Hours Explained
Most power banks advertise capacity in mAh (milliamp-hours), but that number alone doesn’t tell you how much energy the bank actually stores, because it leaves out voltage. The real energy figure is watt-hours (Wh), calculated as Wh = (mAh × voltage) / 1000, using the battery’s internal cell voltage (typically around 3.6 to 3.7V for lithium-ion), not the 5V or 9V your USB port outputs.
UGREEN’s own spec table for its 20,000mAh Nexode bank states the energy content directly as 72Wh, which checks out against the formula at roughly 3.6V. The Anker Prime’s 27,650mAh rating works out to 99.54Wh by the same math, a figure Macworld’s review confirms independently. Airlines and the TSA regulate lithium batteries by watt-hours, not mAh, which is why the Wh number matters more than the mAh one when you’re flying.
How Many Phone Charges You Really Get
The mAh number on the box isn’t what reaches your phone. Anker’s own support documentation explains that charging involves two separate stages of loss: the power bank’s internal circuitry converts stored energy at roughly 80 to 85% efficiency, and the phone’s own charging circuit adds another loss on top of that, for a combined efficiency Anker describes as typically around 60 to 70%.
In practice, that means a 20,000mAh power bank delivers roughly 12,000 to 14,000mAh of usable charge, enough for about three full charges of a 4,000mAh phone battery rather than five. Scale that down proportionally for the 10,000mAh and 12,000mAh banks in this guide. One independent test of an INIU unit found higher real-world efficiency, around 88 to 91%, so treat 60 to 70% as a typical planning range rather than a hard rule.
Flying With a Power Bank
The TSA allows lithium batteries up to 100 watt-hours in carry-on luggage with no stated limit on how many you can bring, but they must go in carry-on, not checked baggage. Batteries between 101 and 160Wh need your airline’s approval in advance and are capped at two spares per passenger, and anything above 160Wh isn’t allowed at all, carry-on or checked, per TSA’s published guidance.
Every power bank in this guide except the Anker Prime (99.54Wh) is comfortably under the 100Wh line. The Anker Prime sits just under it too, but it’s worth double-checking your specific airline’s policy before a flight, since some carriers set stricter limits than the federal minimum.
USB-C Output and Laptop Charging
Not every power bank can charge a laptop, even if it’s physically compatible with USB-C. Most laptops need at least 45 to 65W to charge at a reasonable pace, and some need significantly more. In this guide, the Anker 737 (140W), the Anker Prime (up to 140W on its highest-output USB-C port, with 250W total spread across all three ports) and the UGREEN Nexode 20,000mAh (100W on its primary port) are genuinely built for laptop charging, while the Anker Nano, Belkin and INIU picks top out well below that and are built for phones and tablets instead.
Keep in mind that few of the banks here reliably support pass-through charging, meaning you generally can’t charge the power bank from the wall while it’s also charging another device. Plan to charge your bank separately rather than using it as a travel charging hub.
Power Bank Safety and Recall History
Lithium battery safety has been a real issue in this category, not just a theoretical risk. Belkin recalled its BPD005 Apple Watch-charger power bank for a lithium-cell overheating and fire hazard, and separately recalled its BPB002/PB0003 power banks and MMA008 charging stand for the same type of issue, both per CPSC notices. Neither recall covers the two Belkin models featured in this guide (BPB012 and BPD008), but it’s a pattern worth knowing about before buying any Belkin power bank.
A general safety habit that applies to every brand: unplug a power bank once it’s full rather than leaving it charging indefinitely, avoid charging it on a bed or other soft, flammable surface, and stop using any unit that feels unusually hot, swells, or smells off. Most modern power banks, including every one in this guide, include circuitry that stops charging automatically once full, but that protection isn’t a substitute for basic common-sense handling.
Who Should Skip a General-Purpose Power Bank
If you only ever need to charge a phone a tiny bit and don’t want to think about wattage or Wh at all, a simple bank under $20 from a big-box store will do the job fine, and the extra features on the picks above (laptop charging, displays, magnetic alignment) won’t matter to you. And if your main goal is backup power for your whole home during an outage rather than topping off a phone or laptop, you want a dedicated portable power station instead of any pocket-sized power bank, which these are not built or rated for.
Need to run more than a phone during an outage? See our best portable power station for home backup.
If your car is where you charge most often, our guide to the best front and rear dash cam covers cameras that keep recording while you drive.
Frequently Asked Questions
How many times can a 10,000mAh power bank charge my phone?
Less than the math suggests. Anker's own support pages explain that conversion losses at both the power bank's output stage and the phone's charging circuit mean only about 60 to 70% of the rated capacity actually reaches your phone. A 10,000mAh bank realistically delivers roughly 6,000 to 7,000mAh to your phone, which is about 1.5 to 2 full charges for a typical 4,000mAh phone battery.
Can I take a power bank on a plane?
Yes, in carry-on luggage, with limits. The TSA allows lithium batteries up to 100 watt-hours (Wh) in carry-on bags with no stated quantity limit. Batteries from 101 to 160Wh need airline approval and are capped at two spares per passenger, and anything over 160Wh isn't allowed at all, in carry-on or checked baggage, per TSA's guidance.
Can a power bank actually charge a laptop?
Some can, if the wattage is high enough. Many laptops need at least 45 to 65W to charge at a reasonable speed, and some need more. The Anker 737 (140W), the Anker Prime (up to 140W on its highest-output USB-C port) and the UGREEN Nexode 20,000mAh (100W on its primary port) in this guide are rated for laptop-level output; lower-wattage banks like the INIU pick or Anker Nano are built for phones and tablets instead.
Is it bad to leave a power bank charging overnight?
Most current power banks have built-in circuitry that stops charging once full, so an occasional overnight charge isn't a major risk with a reputable brand. That said, lithium battery fire risk is real, which is why we note brand recall history in this guide; unplugging once it's full and avoiding charging on soft, flammable surfaces like a bed are both reasonable habits.
How long do power banks last before they need replacing?
UGREEN rates its automotive-grade cells in the Nexode 20,000mAh for 1,000 charge cycles before dropping below 80% of original capacity, which is a useful benchmark for the category. Most power banks will noticeably hold less charge after a few years of regular use, even if they still technically work.
Why does my power bank feel warm while charging?
Some warmth during fast charging is normal, since converting voltage generates heat, and reviewers note output on several banks in this category throttles down once things get warm to protect the battery. A bank that gets hot to the touch, swells, or smells unusual is a different matter and should be stopped and inspected.
Final Verdict
For most people, the Anker 737 Power Bank is the best all-around choice, with enough output to charge a laptop and a smart display that takes the guesswork out of charging. If you want similar laptop-level speed in a lighter package, the UGREEN Nexode 20,000mAh is the better value, and the Anker Prime 27,650mAh is worth the extra bulk for multi-day travel while still fitting under the TSA's 100Wh carry-on limit. For everyday pocket carry, the Anker Nano's built-in cable or the budget-friendly INIU pick cover phone charging without the weight, and the Belkin and UGREEN Smart Display picks round out the middle for MagSafe-style and display-focused buyers.
Sources We Checked
Specs and features in this guide come from these manufacturer pages and independent sources, checked on Oct 18, 2026.
- Anker 737 Power Bank (PowerCore 24K) specs (Anker)
- UGREEN Nexode 20,000mAh 130W specs (UGREEN EU)
- Anker Prime Power Bank 27,650mAh 250W review (Macworld)
- Why power bank rated capacity is lower than expected (Anker support)
- TSA: lithium batteries 100 watt-hours or less
- TSA: lithium batteries more than 100 watt-hours
- Belkin BPD005 power bank recall notice (CPSC)
- UGREEN Nexode 12,000mAh 100W Smart Display review (TechRadar)


