First check the ternary parameters: conventional is 2.8 ~ 4.25, iron lithium is 2.5 ~ 3.65V

1. It may be voltage overcharge, over discharge, over current, short circuit, over temperature.

2. Use a multimeter to measure whether the charging and discharging MOS tube is turned on

3. If the battery" target="_blank">lithium battery protection board is equipped with an LED, if it cannot be charged and discharged, the LED will flash for 0.5 seconds and an alarm will be issued.

4. If the lithium battery protection board is equipped with a host computer, you can connect to the host computer to check the protection status

5. The lithium battery protection board has a weak point switch, please check whether the weak point switch is turned on

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