Battery Type: Li-ion Polymer battery Capacity: 1800mAh Nominal Voltage: 3.7V Pack Dimension: 52.00 x 34.50 x 10.0mmWeight: 25g Working Temperature: Less than 60 Degree C(140 Degree F) Compatible Models: Logitech G933 G533 Wireless Headset Compatible Battery Part Number: 533-000132 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 Degree C(140 Degree F).