How to judge battery performance?

How to judge battery performance:

Since the battery is approaching its service life, it is mainly reflected in the decline of its power. By checking the voltage and current at startup, the battery condition can be accurately judged.

A battery is a device that directly converts chemical energy into electrical energy. It is a rechargeable battery designed to be recharged through a reversible chemical reaction. It usually refers to a lead-acid battery, which is a type of battery and is a secondary battery. Battery.

The working principle of the battery: when charging, the internal active material is regenerated by using external electric energy, and the electric energy is stored as chemical energy.