Battery Type: Li-ion Polymer battery Capacity: 2600mAh Nominal Voltage: 3.7V Pack Dimension: 20.0 x 20.0 x 66.0mm Weight: 50g Working Temperature: Less than 60℃(140℉) Compatible Models: Logitech S-00151, Logitech UE Kora Boom, Logitech UE MegaBoom 2 Compatible Original Battery Part No.:533-000104, 533-000138, F12431581 Cautions: 1. DO NOT ATTEMPT OPEN, DISASSEMBLE THE BATTERY. 2. DO NOT CRUSH, PUNCTURE OR DISPOSE OF IN FIRE OR WATER. 3. DO NOT EXPOSE TO ABOVE 60℃(140℉).