Of course, you can’t fit a massive battery in such a small space (only 3.3 x 2.0 x 1.0in and 5.6oz), but the INIU Pocket Rocket P50 Power Bank comes with a very handy 10,000mAh battery capacity.

This is a tiny power bank, but it still packs a punch with 10,000mAh capacity and 45W fast charging support. The device measures 8.3 x 5.2 x 2.6 cm, and weighs just 160g/5.6oz, so you can carry it ...

If a small-sized power bank isn't a priority, Argos is currently offering the larger Belkin 15w 10000mAh Portable Power Bank on sale for £15.99, which can charge three devices at once.