A small, but very mighty power supply. This board was designed to be as small and inconspicuous as possible.
This is a coin cell holder for the common CR2032 type battery. The holder has a neat pop-in, pop-out feature that makes changing the battery easy.
These are very slim, extremely light weight batteries based on the new Polymer Lithium Ion chemistry.
This 3.6V 170mAh rechargeable Ni-Cad battery contains three cells in pyramid configuration.