All you need to know about batteries.
There are various types of battery based on different chemistries. To get the best out of them and to avoid problems you need a basic understanding of their advantages and disadvantages, as well as a little about purchasing, maintaining and disposing of them.
- Old batteries often leak, causing corrosions of the battery contacts, so preventing new batteries from working.
- Lithium batteries can catch fire and burn violently if over-charged, shorted, punctured, or physically damaged in any way.
- Button cells must be kept away from small children. If swallowed, this is a medical emergency as death can result in just a few hours, as a result of electrochemical action in the stomach.
How batteries work
(You can skip this section if you like, though a little more knowledge than you actually need is always helpful.)
Non-rechargeable (primary) batteries
|Zinc carbon and zinc chloride||
Zinc chloride is a heavier duty version of zinc carbon. Alkaline batteries are preferred in almost all applications.
||This is the most economic general purpose type.|
|Silver and Mercury||
Normally only available as button cells for watches and calculators.
Mainly used in smoke alarms and cameras.
Rechargeable (secondary) batteries
Nickel Metal Hydride
- Battery University