The following devices can be recharged.

iOS

iPhone 6s Plus, iPhone 6s, iPhone 6 Plus, iPhone 6, iPhone 5s, iPhone 5c, iPhone 5, iPhone 4s, iPad Air2, iPad mini3, iPad Air, iPad mini2, iPad mini, iPad (3rd and 4th generation), iPad2 and iPod touch (5th generation).

Android

Recharging is possible if the device is USB compatible.