Specification: Internal Battery (7800mAh lithium polymer), Input port (microUSB), Output Port (Standard USB), Onboard Circuit Design (Sony NWZ-S544 Specific), Dimensions (2.75 X 3.25 X 0.75 inches), TipExchange enabled (Yes)
Integrated circuitry tailors output voltage and charging current to exact specification of the Sony NWZ-S544 (accurate to 0.1v).
Very easy to operate. Simply connect Sony NWZ-S544, press activation button on pack, and charging begins. Quick start guide included.
Designed with a front facing LED display that clearly display the current battery capacity at the touch of a button
Continue to use your Sony NWZ-S544 for hours OR recharge it on the go without being tethered to a wall outlet