... , free maintenance, explosion prevention, waterproof, long life4. Lighting time : more than 15 working hours, double light source design5. Charger AC input ... a short circuit protection fuction.Every battery cycled lifetime is more than 500 times.It has 75% rated capacity after using ... adpot 1W high-power Led,The life is more than 50000 hours.illumiance is more than 3000 lux/60lm,it adpot two sets of ...