This is a high-performance replacement digital battery for the Casio EX-H30, guaranteed to meet or exceed the OEM specifications of your original. The digital battery is 1.77 x 1.48 x 0.46 inches with an output of 7.4 volts. The chemistry is Li-Ion at 1500mAH capacity. Manufactured by Empire Scientific, model number BLI-414. 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.