With the same capacity specifications, they can be used in series and parallel at will and charged in parallel. For example, the most common power bank is a model for parallel charging and discharging.
When using lithium batteries, overdischarge and overcharge are the most taboo. Therefore, using a regular charger for charging requires a regular and qualified product. When full voltage is reached, the charging current can be adjusted in time. and converted into holding current for additional charging.
When two batteries are connected in series, if there is no protection, the battery with the smaller capacity will discharge easily. Excessive discharge, especially if the battery voltage is very low, will easily cause excessive discharge. the capacity of the lithium battery must be significantly reduced.
p>