... light )is made of fire-retardant materials, with battery protective circuit,troubleshooting Brief introduction and applicationThis product is ... made of fire-retardant materials, with battery protective circuit for progressive constant current charge, troubleshooting, ... supply: AC220V±10%, 50HzEmergency power supply: 3×1.2V, 300mAh nicad battery,Brightness of light source: EL panel of 15 ...