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 built-in cable if loose ones tend to get left behind.
#1Anker 10,000mAh 30W Power Bank with Built-in USB-C Cable
$20–$30
A 10,000mAh, 30W pack whose built-in USB-C cable loops around as its strap, so there’s nothing to forget. INIU’s 20,000mAh pack and the Prime are rated higher, but one is for days away and the other charges laptops; for a phone through the day, this much charge is enough. Anker started out in 2011 making replacement laptop batteries.
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: School, work and nights out
- Capacity
- 10,000mAh (about 2 phone charges)
- Fastest output
- 30W
- Built-in cable
- USB-C
- Good to know
- Cable doubles as a carry loop
#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 blackouts
- 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 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
#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. Two USB-C ports and a USB-A let a phone and a pair of earbuds charge side by side.
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. It’s about the footprint of a phone, 5.9 by 2.7 in, and 0.7 in thick at half a pound, so it lies flat in a bag or a coat pocket.
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 Zolo 10K | #2INIU 20K | #3Anker Prime 26K | #4INIU 45W 10K | #5CFIAI 15K |
|---|---|---|---|---|---|
| Best overall | Best for camping | Biggest capacity | Best budget | ||
| Picked Rating | 8.8 | 9.0 | 9.0 | 8.7 | 8.6 |
| Price | $20–$30 | $20–$30 | $200–$300 | $20–$30 | $10–$20 |
| Capacity | 10,000mAh (about 2 phone charges) | 20,000mAh (about 4 phone charges) | 26,250mAh (99.75Wh) | 10,000mAh | 15,000mAh |
| Fastest output | 30W | 22.5W | 300W total (140W per port) | 45W | 22.5W |
| Built-in cable | USB-C | No | No | No | USB-C and Lightning |
| Good to know | Cable doubles as a carry loop | Detachable lanyard cable, flashlight; about 11 oz | Screen and app; about 1.3 lb | 40% smaller than a standard 10,000mAh | Screen shows battery % |
| Best for | School, work and nights out | Weekends away and blackouts | Laptops, tablets and long trips | Handheld gaming away from home | Sharing between iPhone and USB-C phones |
| Buy now | Amazon | Amazon | Amazon | Amazon | Amazon |
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