How much capacity do you need?
| Capacity | Roughly charges | Best for |
|---|---|---|
| 5,000 mAh | About 1 phone charge | Pocket and everyday carry |
| 10,000 mAh | About 2 phone charges | Most people — the sweet spot |
| 20,000 mAh+ | 4+ phone charges or a tablet/laptop top-up | Travel and laptops |
- Fast charging: look for USB-C Power Delivery (PD) — 20 W+ for phones, 45–65 W+ for laptops.
- Flights: power banks must go in carry-on luggage; most airlines allow up to 100 Wh (about 27,000 mAh) without approval.
- MagSafe / magnetic: snaps onto the back of recent iPhones — no cable needed.
Real-world capacity is lower than the label (some energy is lost as heat), so expect around two-thirds of the rated mAh to reach your phone.
Our picks
Best for: Most people
Anker 10,000mAh USB-C power bank (PowerCore series)
A compact 10,000 mAh charger with USB-C fast charging — enough for about two phone refills.
- Small and light
- Fast USB-C charging
- Trusted brand
- Not enough for laptops
Best for: iPhone owners
Anker MagGo magnetic power bank
Snaps magnetically onto recent iPhones and charges wirelessly, with a built-in kickstand on some models.
- No cable needed
- Convenient
- Kickstand on select models
- Wireless charging is slower and less efficient
Best for: Budget pick
INIU 10000mAh slim power bank
A slim, inexpensive charger with a built-in display — great value for everyday carry.
- Very affordable
- Slim
- Battery display
- Slower than premium models
Best for: Laptops and travel
Anker Prime 20,000mAh power bank
High-output USB-C ports that can charge a laptop and phone at once, with plenty of capacity for trips.
- Charges laptops
- Multiple ports
- Airline-friendly size
- Heavier
- Pricier
Don't skip the cable
A slow cable wastes a fast charger. A good USB-C to USB-C 100W cable unlocks full speed, and a compact wall charger refills the power bank itself quickly overnight.
FAQ
What size power bank should I get?
10,000 mAh suits most people — about two phone charges in a pocketable size.
Can I take a power bank on a plane?
Yes, in carry-on only. Most airlines allow up to 100 Wh (roughly 27,000 mAh) without special approval — always check your airline.
Can a power bank charge a laptop?
Yes, if it supports USB-C Power Delivery at the wattage your laptop needs, usually 45–65 W or more.