... .9. Optional additional 1600mA 3.7V Li-ion battery, power outage can also be a normal standby ... into Green light, press the switch of the battery cover, the light turned into Red light. Take ... system14. Partial disarm for PIR, backup li-ion battery pack built-in.Product list:1, infrared video hosts x ... panel with internal siren and back up li-ion battery, one magnetic door sensor, One pir detector, ...