What problems will occur when batteries of different capacities are used together?
If different capacity or old and new batteries are used together, there may be leakage, zero voltage and other phenomena. This is due to the difference in capacity during charging. Some batteries are overcharged during charging, some batteries are not fully charged, and some batteries with high capacity are not fully discharged while discharging, while those with low capacity are overcharged. In such a vicious cycle, the battery is damaged and leaks or low (zero) voltage.