This is a high-performance replacement digital battery for the Casio EX-FC200S, guaranteed to meet or exceed the OEM specifications of your original. The digital battery is 1.76 x 1.47 x 0.26 inches with an output of 3.7 volts. The chemistry is Li-Ion at 1000mAH capacity. Manufactured by Empire Scientific, model number BLI-383. 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.