Camera Battery Care
For all Digital and Film cameras
Do not expose your camera batteries to temperatures above 110 degrees F
(43 degrees C). Example, leaving batteries in your car in the hot summer sun can result in permanent damage. Your best solution is to store them in a place that is cool and dry.
Never overcharge the batteries.
Recharge your batteries before or after long-term storage, as batteries discharge over time, and if not recharged they could leak and corrode the camera.
It is also advisable to not mix old and new batteries or batteries of different types