Battery Type: Li-ion Polymer battery Capacity: 800mAh Nominal Voltage: 3.7V Pack Dimension: 7.5 x 20.5 x 52.0mm Weight: 10g Working Temperature: Less than 60℃(140℉) Compatible Models: Cardo Packtalk Duo, Scala Rider Packtalk, Packtalk Slim, SRPT0102 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℉).