Native Union JUMP Cable for Android Devices 2-In-1 Micro-USB to USB Charging Cable & Battery Booster (Slate) Compatible with most Android devices: Samsung, Sony, Blackberry and Nokia smartphones, and tablets with Micro-USB ports 2-in-1 charging cable & compact portable battery booster Unlike power banks, JUMP charges itself after charging your device using auto-charge technology so it's always full and ready to go Plug it into your device for up to 30% extra battery power when you're on the go, or use its Micro-USB to USB connectors to charge from any USB power outlet The size of a matchbox and weighing just 42g, JUMP is compact enough to take with you everywhere