Your device has an internal, non-removable, rechargeable battery. Do not attempt to open the back cover or remove the battery, as you may damage the device. To replace the battery, take the device to the nearest authorized service facility.
Charge your device with AC-60U charger. Charger plug type may vary.
Third-party chargers that comply with the IEC/EN 62684 standard, and that can connect to your device micro USB connector, may be compatible.
Microsoft Mobile may make additional battery or charger models available for this device.
The battery can be charged and discharged hundreds of times, but it will eventually wear out. When the talk and standby times are noticeably shorter than normal, to replace the battery, take the device to the nearest authorized service facility.