There may be two reasons for battery swelling. One is the problem of battery manufacturing level, uneven electrode coating and difficult production process; the other is the problem of overcharging and overdischarging during use. These two factors will cause a violent short circuit-like reaction inside the battery during use, generating a large amount of heat, which in turn will cause the electrolyte to decompose and vaporize, causing a swelling of the battery.
If you have multiple bulged batteries, the cut-off voltage of the charger you are using may not match the battery, and it is recommended to replace it.
Also, the battery will swell if not used for a long time, because air is conductive to a certain extent. Therefore, leaving it too long amounts to direct contact inbe the positive and the negative. battery electrodes, causing chronic damage.
If the spare battery is not used for a long time, it is recommended not to fully charge it and keep it. It is best to conserve about 60% of the energy. Additionally, remove it and. use it after a while, which will affect battery life. There are advantages