Maxell CR2025 coin cells supply long-lasting power, thanks to their lithium chemistry and the latest manufacturing technology. Frequent uses for these slim, circular replacement coin batteries include calculators, laptop motherboards (for CMOS memory), vehicle key fobs and garage door remote controls as well as miniature toys, 3D glasses and small portable medical devices. Their reliable output, even at extreme temperatures (minimum minus 20C, maximum 70 Celsius) means they deliver steady trickle current in outdoor photography equipment and security detectors.