Under the normal power-supplying condition, the inside maintainableNickel-Cadmium cell will recharge atomatilcaly, so that, the emergentlamp will turn on when the power loss of accident or power failure happens.

• 内装免维护镍镉电池组,在正常供电下自动充电,事故断电或停电时应急灯自动点亮。