This is a high-performance replacement cordless battery for the 3M C860, guaranteed to meet or exceed the OEM specifications of your original. The cordless battery is 2.37 x 0.808 x 0.742 inches with an output of 3.7 volts. The chemistry is NIMH at 1500mAH capacity. Manufactured by Empire Scientific, model number CPH-544. We offer a 1 Year Warranty with purchase. See this product elsewhere at a lower price? Call or email us; we have a Price Match Guarantee.