Li-Polymer Battery is over discharged, when the China Lithium Battery power is running put, the voltage will go to a minimum requirement, the protective panel will also be shut down, and it will not be discharged, so the product will turn off automatically and form an over discharging protection. Overcurrent protection, when the lithium battery discharge, the protection board will have a maximum limiting current, different products are different. When the discharge exceeds this current protection panel, it will also automatically shut down.
The lithium battery can be safe and effective use, protection mechanism mainly depends on the lithium battery protection board, its size on lithium battery in parallel complex BMS lithium battery management system with more functions.

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