Battery Type: Li-ion Polymer battery Capacity: 1050mAh Nominal Voltage: 3.7V Pack Dimension: 52.00 x 34.50 x 5.20mm Weight: 15g Working Temperature: Less than 60℃(140℉) Compatible Models: BlueParrott S450, S450-XT 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℉).