This is a high-performance replacement cellular battery for the Panasonic CGA-S303, guaranteed to meet or exceed the OEM specifications of your original. The cellular battery is 1.83 x 1.6 x 0.46 inches with an output of 7.4 volts. The chemistry is Li-Ion at 760mAH capacity. Manufactured by Empire Scientific, model number BLI-290. 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.