The PowerBank can charge any device that uses USB-A or USB-C for charging. The USB-A port (bigger one) is for charging small devices such as a phone, small tablet, keyboard, mouse, headphones, etc.This port can also be used to trickle-charge your laptop.The USB-C port (smaller one) has 3 uses:1. Charging larger devices such as a laptop or large tablet.2. Fast charging small devices such as a phone.3. Recharging the PowerBank itself.