Best fast-charging power bank in lanterns and power banks
A 72.36 Wh power bank with 140 W from one USB-C port and 220 W in total, plus a screen and app: less stored energy than the 25K, more speed.
Our score: 7.8/10 out of 10Researched, not lab-tested
- Battery capacity
- 72.36 Wh
- USB-C output (one port)
- 140 W
- Light type
- Power bank
- Recharging (max)
- 100 W
Is it right for you?
Pros
- 140 W from a single USB-C port; 220 W total
- 20,100 mAh, stated by Anker as 72.36 Wh
- Recharges at up to 100 W over USB-C or its optional base
- 24-month warranty
Cons
- Stores less than a 25,000 mAh bank (72.36 vs 90 Wh)
- Screen and Bluetooth drain it slowly if left on
- Full-speed recharging needs a 5 A cable and a 100 W charger
- Best for
- Owners with a USB-C laptop who want it and a phone charged fast during an outage, and who like seeing charge levels on screen.
- Not for
- Buyers who only need the most phone charges for the money, or want built-in cables.
Our verdict
The Prime 20K is the power bank for a household that runs on a USB-C laptop. One USB-C port gives up to 140 W, and all three ports together give up to 220 W, so a laptop and a phone can charge at full speed at once. A screen and Anker’s app over Bluetooth show what is left, which helps when you are rationing charge through an outage. The warranty is 24 months.
It stores less than the Anker 25K: Anker states 20,100 mAh, or 72.36 Wh, against 90 Wh, and says about 11,250 mAh reaches devices after conversion losses. The screen and Bluetooth also drain it slowly if left on, so switch them off when it goes in the kit. If you mostly charge phones, the 25K stores more; if speed for a laptop matters, this one.
Setup and use
Recharging it. It recharges at up to 100 W over USB-C with a 5 A cable and a charger of 100 W or more, or from Anker’s Prime charging base, sold separately. Charging your devices while it recharges passes on about 70 to 80% of the input, and once full it waits until it drops to about 90% before topping up again.
If the app won’t connect. Hold the button for seven seconds to reset Bluetooth, then pair again. The bank works normally without the app.
In an outage. Charge it fully before a forecast storm and whenever you have power. 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. Compare it in our lights and power banks hub.
Specs
Anker Prime Power Bank (20K, 220W)
Battery
| Battery capacity | 72.36 Wh |
|---|---|
| Capacity (mAh) | 20,100 mAh |
Charging
| USB-C output (one port) | 140 W |
|---|---|
| Recharging (max) | 100 W |
| Total output | 220 W |
Other details
| Weight | 1.12 lb |
|---|---|
| Warranty | 2 years |
| App control | Yes |
| Light type | Power bank |
Maker’s figures, checked 3 Nov 2026.
Anker Prime 20K questions
Prime 20K or the Anker 25K for an outage?
For phones, the 25K: it stores 90 Wh to the Prime’s 72.36 Wh and has built-in cables. For a USB-C laptop, the Prime: it gives up to 140 W from one port and 220 W in total, against 100 W per port and 165 W on the 25K. Both recharge at up to 100 W.
Does it need the app?
No. The app adds detail over Bluetooth, and the screen shows the charge level, but the ports work without either. Anker notes that leaving the screen and Bluetooth on drains the battery slowly, so turn them off when the bank goes into storage in your kit.
How fast does it recharge?
Up to 100 W over USB-C, which needs a 5 A cable and a charger rated at 100 W or more, or Anker’s Prime charging base, sold separately. Anker quotes the 100 W rate only with that cable and charger, so keep a capable USB-C charger with it.