This is a high-performance replacement digital battery for the Olympus BLL-1, guaranteed to meet or exceed the OEM specifications of your original. The digital battery is 4.41 x 2.07 x 1.33 inches with an output of 7.2 volts. The chemistry is Li-Ion at 3400mAH capacity. Manufactured by Empire Scientific, model number BLI-254. 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.