Top 5 compared
The best power banks
A phone that lasts through a long day out, a flight or a late commute, charged from your pocket or bag.
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The top 5 at a glance
A power bank is a battery pack that charges a phone, a tablet or a handheld console away from an outlet, and it earns its place in the bag of anyone who commutes, travels or lives on their phone. Capacity is given in mAh: 10,000mAh charges most phones about twice and still fits in a pocket, while bigger packs trade weight for more charges.
Some have their cables built in; others come with a separate cable that unplugs. A pack strong enough for a laptop, like Anker’s Prime, is a bag battery rather than a pocket one. On a plane, power banks go in carry-on bags, never checked ones, and at 99.75Wh the Prime is just under 100Wh, the most allowed in carry-on without the airline’s approval.
What matters
- USB-C in and out, at 20W or more for fast phone charging.
- For a laptop, the wattage from one port, not the total.
- A display with the charge left as a percentage.
- Enough ports to charge two or three things at once.
#1Anker Prime Power Bank, 26,250mAh 300W (A110A)
$200–$300
Two USB-C ports and a USB-A share 300W, with up to 140W from one port, enough to keep a MacBook Pro running at full speed while it charges. A screen shows the charge left and what each port is putting out, so there’s no guessing before a long flight.
What owners say: Owners have taken a MacBook from 15% to full with it, or charged a phone, tablet and laptop at once, and say it packs a lot of power for its size. The price divides them, and a few had problems within months.
Heads up: At about 1.3 lb it’s a battery for a laptop bag, not a pocket.
A closer look: The quickest refill needs two USB-C chargers plugged in at once, 250W between them, which Anker says gets it to half in 13 minutes; one ordinary laptop charger takes a good deal longer. The Anker app can cap a port’s output, and there’s no wall plug in the box, just the 3.3 ft cable and a travel pouch.
- Two USB-C and one USB-A
- Refills from two chargers together
- TSA-approved for flights
- App can cap each port
- Travel pouch in the box
Best for: Laptops, tablets and long trips
- Capacity
- 26,250mAh (99.75Wh)
- Fastest output
- 300W total (140W per port)
- Built-in cable
- No
- Good to know
- Screen and app; about 1.3 lb
#2INIU 20,000mAh 22.5W Power Bank (P512)
$20–$30
Twice the capacity of a pocket pack in not much more bulk: 20,000mAh, which INIU says is four full phone charges, at 22.5W. The braided USB-C cable doubles as a lanyard and unclips, and there’s a flashlight for a power outage or a dark tent.
What owners say: Easy to carry and fairly priced, owners say, and handy for charging more than one device at a time. Charging speed and staying power split them: some find it refills quickly, while a few had one stop holding a charge within three months.
A closer look: At about 11 oz it’s a jacket-pocket or bag battery rather than a jeans one, so it suits a weekend away, a festival or a camping trip more than the daily commute. Its capacity is within the limits for carry-on bags, and if it fails within three years INIU replaces it.
- Digital charge display
- Three output ports
- Within carry-on limits
- 3-year replacement cover
Best for: Weekends away and camping
- Capacity
- 20,000mAh (about 4 phone charges)
- Fastest output
- 22.5W
- Built-in cable
- No
- Good to know
- Detachable lanyard cable, flashlight; about 11 oz
#3Anker 10,000mAh 30W Power Bank with Built-in USB-C Cable
$20–$30
Anker started out in 2011 making replacement laptop batteries. This 10,000mAh pack puts out up to 30W, and the built-in cable doubles as a strap, so there’s nothing to forget.
What owners say: About the size of a deck of cards, it slips into a purse and charges quickly, and owners like the built-in cable. Some find it holds plenty, others get one full phone charge, and a few had the cable stop working.
A closer look: There’s no wall charger in the box, but a USB-C charger you already own will refill it, and it takes up to 20W, so one with at least that much charges it fastest. The built-in cable is only 5.4 in long, which keeps things tidy in a bag or on a tray table but means holding phone and battery together while they charge.
- Cable tested for 10,000 bends
- 5.4-inch cable
- 18-month warranty
Best for: Phone top-ups without a loose cable
- Capacity
- 10,000mAh (about 2 phone charges)
- Fastest output
- 30W
- Built-in cable
- USB-C
- Good to know
- Cable doubles as a carry loop
#4INIU 45W 10,000mAh Power Bank
$20–$30
Around 40% smaller than a typical 10,000mAh power bank, so it genuinely fits a jeans pocket, and 45W fast charging means less time tethered to an outlet.
What owners say: Owners like the fast charging most, and a size that drops easily into a purse; it’s light with it too. Battery life is where they split: many say it holds a charge for a long time, but a few found it stopped holding one after two months.
Heads up: INIU covers it for three years, so keep the order details handy in case it ever stops holding a charge.
A closer look: Unlike power banks with a fixed cable, this one comes with a short braided USB-C cable that unplugs, so a frayed or lost one is easily swapped for any spare. It can charge an iPad, a Nintendo Switch or a Steam Deck as well as a phone, so it suits gamers on the go too.
- Fits a jeans pocket
- Charges Switch and Steam Deck
- Detachable braided USB-C cable
- Two USB-C and one USB-A
- 3-year INIU cover
Best for: Handheld gaming away from home
- Capacity
- 10,000mAh
- Fastest output
- 45W
- Built-in cable
- No
- Good to know
- 40% smaller than a standard 10,000mAh
#5CFIAI 15,000mAh Power Bank with Built-in Cables (Jet)
$10–$20
A 15,000mAh pack with USB-C and iPhone cables built in so there’s nothing extra to carry.
What owners say: Owners like getting several phone charges from one fill, with the cables always there, and it fits in a purse. Some call it light, others heavy, and a few stopped working after a handful of uses.
A closer look: A quick press of the power button shows the exact charge as a percentage, so there’s no guessing whether it needs plugging in before a trip. With built-in USB-C and iPhone cables plus two extra ports, it can charge four devices at once, which suits a household with a mix of phones. A wall charger isn’t included, so use one you already own.
- Charges four devices at once
- Extra USB-C and USB-A ports
Best for: Sharing between iPhone and USB-C phones
- Capacity
- 15,000mAh
- Fastest output
- 22.5W
- Built-in cable
- USB-C and Lightning
- Good to know
- Screen shows battery %
How they compare
Swipe sideways or rotate device to see all 5.
| Feature | #1Anker Prime 26K | #2INIU 20K | #3Anker Zolo 10K | #4INIU 45W 10K | #5CFIAI 15K |
|---|---|---|---|---|---|
| Best overall | Runner-up | Best budget | |||
| Picked Rating | 9.1 | 9.0 | 8.8 | 8.7 | 8.6 |
| Price | $200–$300 | $20–$30 | $20–$30 | $20–$30 | $10–$20 |
| Capacity | 26,250mAh (99.75Wh) | 20,000mAh (about 4 phone charges) | 10,000mAh (about 2 phone charges) | 10,000mAh | 15,000mAh |
| Fastest output | 300W total (140W per port) | 22.5W | 30W | 45W | 22.5W |
| Built-in cable | No | No | USB-C | No | USB-C and Lightning |
| Good to know | Screen and app; about 1.3 lb | Detachable lanyard cable, flashlight; about 11 oz | Cable doubles as a carry loop | 40% smaller than a standard 10,000mAh | Screen shows battery % |
| Best for | Laptops, tablets and long trips | Weekends away and camping | Phone top-ups without a loose cable | Handheld gaming away from home | Sharing between iPhone and USB-C phones |
| Buy now | Amazon | Amazon | Amazon | Amazon | Amazon |
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