Acefast 10,000mAh 30W Power Bank, LED Display, Mountain Mist

Long days out are where a pack like this earns its place, on a train, up a hill or halfway round a city with the camera app open. It holds 10,000mAh, listed at 77Wh, which covers several phone charges before you need to think about a socket again.

USB-C handles 30W in either direction and USB-A gives up to 22.5W, with Quick Charge, Adaptive Fast Charging and FCP supported on both. When two devices are plugged in together the pack drops to a shared 5V at 3A, steady enough to keep a phone and a torch or a pair of headphones going at the same time.

You can read the exact percentage from the LED display instead of guessing. It measures 130 x 66 x 18mm and weighs 220g in a flame retardant PC shell, so it lies flat in a jacket pocket. Mountain Mist is a cool pale grey with a clean matte finish.

• 10,000mAh, 77Wh capacity
• USB-C in and out at 30W
• USB-A output up to 22.5W
• Both ports together at 5V 3A
• LED digital display
• 130 x 66 x 18mm, 220g