1. Use the original charging cable to connect to the power supply to charge. Do not use the mobile phone during the charging process.
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2. Use a low-voltage charger to charge for 30 minutes to activate the battery, which can be charged using computer USB and power bank.
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3. You can try to quickly charge for one to two hours, and use a professional detector to see if the voltage is increased. If there is an increase, you can choose to continue charging with the original charger, so that the lithium-ion battery can be activated.
It won't charge because the battery is dead. Need to buy a new one. Can't be activated.