1. The most useful method is to directly test and compare various important performance indicators.

Since most of the indicators are measured with special instruments, it is not feasible for ordinary consumers. Of course, there are some indirect methods that can be used for rough detection. For example, using the same electrical appliance (such as a speaker) using two different batteries under the same conditions, a battery with a longer life is naturally a product with higher capacity.

2. Measure weight and see capacity

Generally speaking, batteries with the same technology, the higher capacity must be the heavier.

3. Look at the packaging

Appearance is an important reference for measuring the quality of many products. As for the battery, a dense and smooth battery case, clear printing, and excellent packaging material texture are the basis of quality assurance. Qualified battery products should be printed on the outer packaging of the battery with the trademark, factory name, site, product category and model, voltage identification, implementation standards, warning content, production date, etc. Most inferior products will have unqualified items in the above appearance and packaging indicators.