This is a high-performance replacement flashlight battery for the Rayovac 123A, guaranteed to meet or exceed the OEM specifications of your original. The flashlight battery is 0.65 x 0.65 x 1.35 inches with an output of 3 volts. The chemistry is Lithium at 1500mAH capacity. Manufactured by Empire Scientific, model number CR123/1. 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.