This battery holder connects 2 AAA batteries together in series for powering all kinds of projects. We spec'd these out because the box is open and nicely slim, and 2 AAA's add up to about 3V for low-voltage electronics projects. 

Fits any standard AAA battery. When using rechargeable NiMH the output voltage will range from about 2.7V with charged batteries to 1.8V at the end of life with a nominal voltage of 2.4V. When using alkalines, the output will range from 3.2V with new batteries to 2.2V at the end of life with a nominal voltage of about 3V.

The polarity matches that of our 2-pin JST cable and Li-Ion/Poly batteries. Uses a genuine JST connector so it won't 'catch and tear' in JST connectors.