Features
-NO BATTERIES REQUIRED
-Rechargeable 2200-XmAh Battery inbuilt
-Small and lightweight
-Built in female USB port
-Includes Micro-USB charging cable for the Lifeline
-Built-in protection functions for short circuit and over charge/discharge
 
Compatibility 
MICRO USB
Compatible with most devices with a Micro USB socket.
USB-C
Compatible with most devices with a USB-C socket. 
APPLE
Comaptible with all Apple devices that have 8 Pin lightning socket.