Function introduction:
1. Over-discharge protection: when the battery electricity is about to run out, the voltage will reach a required minimum value, the protection board will also be closed, can not be discharged, the product will automatically shut down, forming an over-discharge protection effect.
2. Overcharge protection: when charging the product, when the voltage reaches the maximum voltage of the battery (4.2V), the protective board will automatically turn off the power, indicating that the full is not continuing to charge, forming a kind of overcharge protection.
3. Short circuit protection: when the battery is not careful short circuit, the protection board will automatically shut down within a few milliseconds and will not be electrified. At this time, it is all right for the positive and negative electrodes to encounter a piece, forming a short circuit protection that would avoid an explosion.
4. Overcurrent protection: when the battery is discharged, the protection board will have a maximum limited current, different products are different, when the discharge exceeds this current protection board will also be automatically closed.