1. The quality of the battery. Firstly, it is necessary to observe the appearance of the battery to see if it is damaged or protruding. The battery has potential safety hazards in the above situations and must not be used, otherwise unexpected consequences may occur. The second is to know the material of the battery. As is well known, lead, as the core material of batteries, determines the quality of the battery based on its quality. Secondly, it depends on the material of the battery casing.
2. Battery warranty period. Batteries are not like fast-moving consumer products. Its lifespan is very long, usually around 5 years, and some even longer. If there are quality issues during this period, maintenance personnel will be required for maintenance, which is also a small cost. Therefore, the warranty period is very important. The warranty period for large brand batteries is usually one year, and the after-sales maintenance procedures are cumbersome. On the contrary, some domestic brands offer much cheaper after-sales service for their batteries.