This is a high-performance replacement cellular battery for the Ericsson I, guaranteed to meet or exceed the OEM specifications of your original. The cellular battery is 1.88 x 1.37 x 0.18 inches. Manufactured by Empire Scientific, model number BLI-1121-.6. 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.