This is a high-performance replacement digital battery for the Fuji FINEPIX F420, guaranteed to meet or exceed the OEM specifications of your original. The digital battery is 1.75 x 0.86 x 0.41 inches with an output of 2.4 volts. The chemistry is NiMH at 750mAH capacity. Manufactured by Empire Scientific, model number BNH-249. 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.