This is a high-performance replacement digital battery for the Canon POWERSHOT SD4500IS, guaranteed to meet or exceed the OEM specifications of your original. The digital battery is 1.7 x 0.57 x 0.59 inches. Manufactured by Empire Scientific, model number BLI-398. 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.