Illuminate your environment when there's an unexpected power cut with this rechargeable emergency light. Convenience You don't have to desperately try and find this emergency light in the darkness when there's a power cut as it has an auto-start option, making it reliable. Protection Even when this lantern auto-starts, it won't short circuit as it comes with a discharge protection feature. You don't have to worry about power fluctuations damaging this lantern either as it is overcharge protected. Power This emergency light has a battery capacity of 2000 mAh and it delivers an output of 3.7 volts. It takes up to 8 hours to charge this lantern fully. When fully charged, this lantern will work for up to 4 hours.