Glossary
Secondary Battery
A rechargeable battery.
The chemical reactions that take place when generating electricity can be almost completely reversed when the battery is recharged. There are big differences in quality, depending on how fast you can charge the battery, how efficiently and with little loss it can be charged (i.e. whether you need more power to charge it than you can take out afterwards) and how often you can recharge it before the charge is no longer sufficient to provide the necessary voltage.