1,Battery:rechargeable battery 2,Material:abs 3,Long life,super-brightness led bulbs 4,color: customize Usage Instruction:1. ... be more than 15 hours.2. When the LED bulbs is dark during usage,That means battery is ... 2. Please dont use when charging, it would burn LED bulb, or damage inner componenrs.3. Please dont ... when charging.(Suggestion:charging in daylight time) 4pcs LED rechargeable Flashlight