Best power bank for your phone
Updated 2026-11-08 · Pick: Anker Nano Power Bank 10K 45W (A1638), $59.99 on Amazon (checked 2026-11-12), buy on Amazon: https://www.amazon.com/dp/B0FKN5RCV7?tag=dealectric-20
Short answer. A 10000mAh USB-C phone power bank is the right size, but 20 W is not: iPhone 17 needs a 40 W source and Galaxy Plus/Ultra 45 W with PPS. The Anker Nano Power Bank 10K 45W states 40 W for iPhone 17 and 45 W for Samsung; a 20 W bank such as Belkin's BoostCharge 10K fits the iPhone Air, 17e, 15 and 16 instead.
Searched as: best 10000mAh phone power bank 2026 Anker INIU USB C review
How this table was made: each figure comes from the maker's own US product page or manual, or from the reviewer named next to it, checked 2026-11-08. Dealectric does not test units itself. Rows with a Buy link are products Dealectric lists: the links are affiliate links, and their codes are re-tested in the brand's own cart every day (last check 2026-11-13).
| Model | Fast-charges at full speed | Wired output (maker) | Cable and weight | Price | Buy |
|---|---|---|---|---|---|
| Anker Nano Power Bank 10K 45W (A1638) | iPhone 17 / 17 Pro / Pro Max at 40 W and Galaxy Plus/Ultra at 45 W (Anker-stated); iPhone 14 and earlier need a Lightning adapter | 45 W max from the USB-C cable or port used alone; 22.5 W total with two devices (15 W + 7.5 W) | Built-in retractable USB-C, about 2.3 ft; 0.51 lb (Anker) | $59.99 on Amazon (checked 2026-11-12) | Buy on Amazon |
| Belkin BoostCharge Power Bank 10K with Integrated Cable (BPB021) | iPhone Air, 17e, 15 and 16 (Apple's 18 to 20 W tier); below the 40 W iPhone 17 and 45 W Galaxy tiers | 20 W max; 15 W shared with two devices | Integrated 2.2 in USB-C cable; 3.9 × 2.5 × 0.9 in | $24.99 (Belkin, 2026-11-08) |
What the differences mean
The common advice to buy any USB-C PD bank of 20 W or more is right for some phones and wrong for the newest ones. Apple's fast-charge support page (published 22 Oct 2026) says the iPhone 17, 17 Pro and 17 Pro Max reach 50% in about 20 minutes only with a 40 W or higher adapter; the iPhone Air and 17e need 20 W or higher; the iPhone 15 and later need an 18 W or greater USB-PD source. A 20 W bank therefore meets the Air, 17e, 15 and 16 tier and misses the 17 and 17 Pro tier. Samsung's support page adds a second rule: Super Fast Charging switches on only when the source supports USB PD PPS, however high its wattage label, and Samsung's compatibility chart gives 45 W Super Fast Charging 2.0 to the S23+, S23 Ultra, S24+, S24 Ultra, S25+, S25 Ultra, S26+ and S26 Ultra, with the base S23, S24, S25, S26, FE and Edge models on 25 W Super Fast Charging.
Delivered capacity is the same story for every 10,000 mAh bank here. Engadget's tests put about 5,800 mAh into the phone from a 10,000 mAh pack. Against Apple's EU-label capacities that is 5,800 ÷ 3,692 = 1.6 charges of an iPhone 17, 5,800 ÷ 4,252 = 1.4 of a 17 Pro and 5,800 ÷ 5,088 = 1.1 of a 17 Pro Max, so a 5,000 mAh bank would not fill a Pro Max once.
Charging two things at once also changes the answer. Anker's spec for the Nano 10K 45W is 15 W on the cable plus 7.5 W on the port when both are in use, 15 + 7.5 = 22.5 W total, so with earbuds on the port the phone sits below Apple's 18 W threshold. The 45 W and 40 W figures hold only with the phone alone. Belkin's page gives 15 W shared output for the BoostCharge 10K with two devices, below the same threshold.
| Your phone | What it needs | Fits best |
|---|---|---|
| iPhone 17, 17 Pro, 17 Pro Max (wired) | 40 W or higher PD source | Anker Nano Power Bank 10K 45W (states 40 W for iPhone 17) |
| Galaxy S23+/S24+/S25+/S26+ and Ultra | 45 W with PPS (Super Fast Charging 2.0) | Anker Nano Power Bank 10K 45W (states 45 W for Samsung and Samsung Fast Charging 2.0) |
| iPhone Air, 17e, 15, 16 | 18 to 20 W PD | Belkin BoostCharge 10K at $24.99 (20 W), or the Anker if you also own a 40 W or 45 W phone |
| iPhone 14 and earlier (Lightning) | Any 18 W PD port plus a USB-C to Lightning cable or adapter | Either bank; both have a built-in USB-C cable, and the Anker needs a USB-C to Lightning adapter that is not in the box |
Which bank fast-charges which phone
Anker Nano Power Bank 10K 45W. Anker's product page is the only one in this group that states a per-phone figure: 45 W max output for Samsung and 40 W max output for the iPhone 17 series, from the USB-C port or cable only, and only the USB-C cable and port support Samsung Fast Charging 2.0. The output table runs 5V⎓3A through 20V⎓2.25A, input is 30 W max, weight is 0.51 lb. Gigazine measured 34 to 36 W into a Pixel 10 Pro XL and a 160-minute recharge at 29 W, so the 45 W label is a ceiling rather than a typical phone number. Anker also notes that iPhone 14 and earlier need a USB-C to Lightning adapter that is not in the box. buy on Amazon: https://www.amazon.com/dp/B0FKN5RCV7?tag=dealectric-20
Not recommended
Belkin BoostCharge 10K with integrated cable is well built but tops out at 20 W for $24.99, which meets Apple's 18 to 20 W tier for the iPhone Air, 17e, 15 and 16 and misses the 40 W iPhone 17 tier and the 45 W Galaxy tier. Its 2.2 in cable also means the phone has to sit on the bank.
Any Anker 10,000 mAh 22.5 W bank with a built-in cable sold without a model number. Notebookcheck reported Anker's 2025 recall of about 481,000 power banks after 33 fire or explosion reports, and the A1257 10,000 mAh model is on that list. Check the model number printed on the back before buying a 22.5 W Anker 10K, and register any A1257 with Anker's recall programme.
Sources
- Anker Nano 10K 45W: 45 W Samsung / 40 W iPhone 17 only from the USB-C cable or port alone, 15 W + 7.5 W with two devices, 30 W input, 0.51 lb, Lightning adapter note, $59.99 — www.anker.com
- Anker US warranty policy: standard warranty period chart gives 24 months to Prime / MagGo power banks, 36 months to PowerCore Reserve and 18 months to other power banks (read 2026-11-08) — us.anker.com
- Apple fast-charge thresholds: 40 W for iPhone 17/17 Pro/Pro Max, 20 W for iPhone Air and 17e, 18 W for iPhone 15 and later; 15 W wireless cap for iPhone 15 and earlier — support.apple.com
- iPhone 17 spec: 50% in 20 min with 40 W adapter or higher; MagSafe and Qi2 wireless up to 25 W with a 30 W adapter — www.apple.com
- Samsung: Super Fast Charging needs USB PD PPS regardless of the charger's maximum output — www.samsung.com
- Samsung chart: 45 W Super Fast Charging 2.0 on S23+/S23 Ultra/S24+/S24 Ultra/S25+/S25 Ultra/S26+/S26 Ultra; base, FE and Edge models on 25 W Super Fast Charging — www.samsung.com
- Samsung US: Super fast charging only on select devices with a 25 W or 45 W adapter; not all devices support 45 W — www.samsung.com
- Belkin BoostCharge 10K with integrated cable: 20 W, 15 W shared with two devices, 2.2 in cable, 3.9 × 2.5 × 0.9 in, $24.99 — www.belkin.com
- Engadget tests: 10,000 mAh of pack capacity delivered about 5,800 mAh to the phone — www.engadget.com
- iPhone 17 family battery capacities from Apple's EU energy labels: 3,692 / 3,149 / 4,252 / 5,088 mAh — www.notebookcheck.net
- Gigazine measurements of the Anker Nano 10K 45W: 34-36 W into a Pixel 10 Pro XL, 160-minute recharge at 29 W — gigazine.net
- Anker 2025 recall including the A1257 10,000 mAh bank: about 481,000 units, 33 fire or explosion reports — www.notebookcheck.net
Published 2026-11-08; updated 2026-11-08. The buy links are affiliate links; see the disclosure. Corrections welcome at [email protected] or /feedback.