... circuitNominal Voltage: 3.7VScope: digital camera battery, electric toy battery, flashlight batteryThe Shenhuo dual-slot charger ... board and without protection board) lithium-ion battery, battery adaptation range (18650 to 18730), the charging ... battery charging; clear man-machine interface: the charging red light, the batteries charge saturation green light. Supfire 18650 lithium-ion battery double ...