Battery Type: Li-ion Polymer battery Capacity: 300mAh Nominal Voltage: 3.7V Pack Dimension: 5.0 x 25.5 x 32.0mm Weight: 10g Working Temperature: Less than 60℃(140℉) Compatible Models: Garmin Fenix 3, Fenix 3 HRCompatible Battery Models: 361-00034-02Cautions: 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℉).