We test 18 power banks designed to keep even the most power-hungry smartphones kicking day and night. Our detailed test reveals:
- the number of times they can charge your phone before they need charging
- approximate charge time
- approximate portable battery recharge time
- size, weight and which models can fit in your pocket.
Our interactive comparison table shows the number of devices each power bank can simultaneously charge, included USB cord length, as well as useful features and functions such as auto on/off settings and inbuilt torches.