Battery is 84% healthy. Do you need to change the battery?

No need. The battery health value is 84%, which will not affect the normal use. It can still be used for a period of time, and it needs to be replaced with a new battery when the power is lower than 80%. Battery refers to a part of the space of a cup, can or other container or composite container containing electrolyte solution and metal electrodes that generate current, and a device that can convert chemical energy into electrical energy. Divided into positive electrode and negative electrode.