There are many different types of batteries available today. Different battery sizes (these are sometimes called "form factors") Different battery chemistries. i.e.- NiMH, NiCD, NiZN, Li-Ion - Rechargeable, Lithium - Single use (also called Photo Lithium) Which ones are best for which application? Sometimes that is an easy question and sometimes it is not so simple. Many times the answer is "It depends" and that may or may not be helpful.
This page is designed to help you to get to the info that you want - and not get inundated with too much info - so that you can get the ideal battery for your needs and go back to just ignoring that little fellow.
After all, once a battery is doing its job we can just ignore it - right?