Amazon | Pebble PowerShare (Pink)
Power Share allows you to transfer battery charge from one phone to another. Now you can simply borrow some charge from a friend when your phone’s running out of battery. It’s so tiny that you can easily carry it in your pocket, wallet or use it as your keyring. The input and output current is automatically adjusted as per the smartphone/tablet. The phone/tablet providing the charge must have OTG functionality. The phone receiving the charge can be ANY smartphone.