Protection devices of maximum current steady and cut-off electric circuit avoid further damage of failure phone circuit board.
最大电流恒定及截止式电路保护装置，免除故障手机线路板进一步损坏。
Uses the constant electric current and the constant voltage way charge, the prohibition reverse charges. If the battery positive electrode and the cathode meet instead, can damage the battery.
先恒流后恒压方式充电，禁止颠倒的方式充电。如果电池正负极颠倒充电会带来危险。
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