Best high-capacity power bank in lanterns and power banks
A 90 Wh power bank with two built-in USB-C cables and up to 100 W per port: enough to keep phones going for days or top up a laptop.
Our score: 7.7/10 out of 10Researched, not lab-tested
- Battery capacity
- 90 Wh
- USB-C output (one port)
- 100 W
- Light type
- Power bank
- Recharging (max)
- 100 W
Is it right for you?
Pros
- 25,000 mAh, which Anker rates at 90 Wh
- Up to 100 W from each USB-C port or cable; 165 W total
- Two built-in USB-C cables, one retractable
- Anker describes it as flight approved
Cons
- 595 g (21 oz): a bag item, not a pocket one
- 18-month warranty, shorter than the Prime's two years
- Recharges at 100 W only above 25% charge
- About 63 to 70 Wh reaches devices, per Anker
- Best for
- Keeping several phones, a tablet or a USB-C laptop charged through a multi-day outage, without hunting for cables.
- Not for
- Anyone who wants a pocket-sized bank or a light source.
Our verdict
This is the power bank for keeping a household’s phones going through a multi-day outage. Anker rates the 25,000 mAh cell at 90 Wh, and says about 63 to 70 Wh of that reaches your devices after conversion losses. Two USB-C cables are built in, one of them retractable, so nobody has to find a cable in the dark, and each USB-C port or cable can give up to 100 W, enough for most USB-C laptops. All outputs together give up to 165 W.
The catches are small but real. At 595 g (21 oz) it is a bag item, not a pocket one. It recharges at up to 100 W, but only once it is above 25% charge, so a fully drained bank starts slowly. And the warranty is 18 months, shorter than the Anker Prime 20K‘s two years. If you want faster single-port charging for a laptop, the Prime is the choice; if you want the most stored energy and no loose cables, this one.
Setup and use
Recharging it. Anker quotes about two hours to recharge with a charger of 100 W or more, at room temperature. Charge it fully when a storm is forecast, and again whenever you have power from a generator or power station, since a bank only helps if it went into the outage full.
In an outage. It charges phones, tablets and laptops; it is not a light. Pair it with a lantern such as the Goal Zero Lighthouse 600, and use lanterns and flashlights rather than candles, as CPSC advises. More options are in our lights and power banks hub.
Specs
Anker Power Bank (25K, 165W, Built-In and Retractable Cables)
Battery
| Battery capacity | 90 Wh |
|---|---|
| Capacity (mAh) | 25,000 mAh |
Charging
| USB-C output (one port) | 100 W |
|---|---|
| Recharging (max) | 100 W |
| Total output | 165 W |
Other details
| Weight | 1.31 lb |
|---|---|
| Warranty | 1.5 years |
| Light type | Power bank |
Maker’s figures, checked 3 Nov 2026.
Anker 25K questions
How much energy does the Anker 25K actually deliver?
Anker rates the cell at 25,000 mAh, which it states equals 90 Wh, and says about 63 to 70 Wh reaches devices once conversion losses are counted. Anker doesn’t publish a number of phone charges, and phones differ, so we don’t quote one; compare that 63 to 70 Wh with your phone’s battery size.
Can it charge a laptop?
Yes, most USB-C laptops. Each USB-C port and each built-in cable gives up to 100 W, and total output across all ports is 165 W, so a laptop and a phone can charge together. Laptops that need more than 100 W from one port may charge slowly or not at all.
Why does it recharge slowly when it is empty?
Anker says the 100 W recharging rate applies only above 25% battery. Below that it charges more slowly, so a fully drained bank takes longer than the roughly two hours Anker quotes with a 100 W charger. Topping it up before it runs flat avoids the wait.