High capacity power banks like this INIU 20,000mAh model sit in the same bracket as Anker and UGREEN, aimed at people who want one battery pack to cover a phone for days and still have enough headroom for tablets and smaller laptops. The headline feature is 45W USB Power Delivery fast charging, which matters if you want your compatible devices to charge at near wall plug speeds rather than crawling along on basic 5V output. The built in cable also means one less lead to remember in your bag.

Who is this power bank best for?

Commuters and travellers who top up on trains, in airports, or between meetings, and anyone with a USB C laptop that can accept 45W input. It is also a sensible choice for modern Android phones and iPhones that support fast charging, especially if you hate carrying separate cables.

  • 20,000mAh capacity, enough for multiple phone charges before you need to recharge the bank
  • 45W PD output, suited to faster top ups and some lightweight laptops over USB C
  • Built in cable, reduces clutter and helps avoid forgotten leads