1. The actual capacity of the battery and its difference from the nominal capacity.
The actual capacity of the evaluation is based on 0.2C discharge. Within the specified number of cycles, the weighted average of each recorded power is the actual capacity. The closer the actual capacity is to the nominal capacity, so it is more "true".
2. Evaluate battery life.
On the basis of the actual capacity evaluation of the battery, the actual capacity of each battery is compared with the nominal capacity one by one, and the respective capacity decay rate is obtained to evaluate the battery life.
3. Evaluation of self-discharge.
Take a certain period of time as a rechargeable battery evaluation cycle, and keep it to the cut-off voltage of the rechargeable battery to see the battery capacity change during the period. Attention should be paid to this process: each brand should select several batteries because there is a problem with the battery discharge balance. Even if the overall self-discharge of different brands of rechargeable batteries is similar to the rechargeable battery evaluation results, a battery with poor consistency can be considered to have poor long-term capacity to retain power.
4. Safety performance.
Mechanical testing: vibration, free fall, shock, crush, thump, puncture, etc.
Electrical test: overcharge, over-discharge, high-temperature discharge, low-temperature discharge, cyclic discharge, external short circuit, etc.