In the mobile phone, the battery occupies very important position, either from the technical point of view or from the price. Today, the mobile phones are being sold on market, the batteries used have basically completed the transition from nickel battery to Lithium Polymer Battery. The composition of Lipolymer Battery is the core and the protective plate, the battery remove the protective plate is the core. The protection board main effect is as follows:
1.Overcharge protection. When you charge, the voltage reaches the maximum 4.2V, the protection board will automatically power off, it can not be charged.
2.Excessive protection. When your lithium polymer battery is almost out of use, the protection board will be closed, not in the discharge, your instrument will turn off automatically.
3.Over current protection. When the battery discharge, it will have a maximum limiting current, when the discharge exceeds this current, the protection board will automatically shut down.
4.Short circuit protection. When your battery accidentally short circuit, the protection board will shut down within a few milliseconds automatically, not on the power.
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