[Intelligent battery indicator light] 1. When the battery is in working state, the green light is always on. 2. The battery is in charging state: the yellow, green, and red lights flash alternately. After being fully charged, the light goes out. 3. When the battery temperature is too high, the red light flashes.
【Safety & Durablity】- Built-in smart chip can over-charge protection, over-heating protection, short-circuit protection, over-current protection, overvoltage protection, avoid excessive use and improve tools working life.