The LED lantern has built-in 4400mAh rechargeable battery. A fully charge can be last up to 12 hours. The lantern can be used as power back for smartphone or tablet in emergency. Similarly, this makes it an ideal candidate for your emergency or survival kit.This rechargeable LED lantern features a slip-proof handle for easy hanging and a hand-free light source. This LED flashlight can also help light up your patio or backyard during winters!