The Emergency light is with built-in long-life and maintenance-free rechargeable Lead Acid battery of high capacity as 1600mAh. The battery has more than 500 times charging and discharging recycle life. Please charge it for about 15 hours after every 3 months storage or the life time of battery will be changed. Caution: Power source and socket should be installed according to safety rules and regulations. Please dont turn on during charging process, to avoid burning LED bulb or some inner parts. Children must be guided by adult to use it properly. The charging process must be far away from any inflammable and explosive materials. Definitely Value for Money.