I compact design, meeting the requirements of safety regulations II with LED drive output port III with battery charging port IV with red and green indicator light output port V with reset test port VI output short circuit protection VII over temperature protection function Ⅷ 100% power emergency; The switching power supply control circuit is adopted, which automatically lights up the emergency light source in case of power failure, automatically charges when the power supply is restored, and the conversion time is 1 second. The internal is equipped with overcharge and over discharge protection circuit, and the trickle charging current is 120mAh ⅸ. It is suitable for indoor and outdoor LED emergency exit lights