Main Features: Overcharge protection, over-discharge protection, short circuit protection, over-current protection Attention: Please pay attention to the use conditions of input and output voltages and load currents so that the power consumption in the protection board does not exceed the permissible power consumption of the electrical parameters.;The load current should not be operated for a long time between the upper limit of continuous operation current and the over-current protection current.;When connecting the battery, there is a possibility that the battery cannot be discharged, in this case, connecting the charger can be restored to the normal working condition.;Fourth, although this protection board is built-in anti-static protection circuit, but please do not touch the board with your hand when the electric protection board is working, so as not to damage the protection board by static electricity.