This is a high-performance replacement cellular battery for the Samsung I9220, guaranteed to meet or exceed the OEM specifications of your original. The cellular battery is 2.66 x 2.04 x 0.583 inches with an output of 3.7 volts. The chemistry is LI-ION at 3800mAH capacity. Manufactured by Empire Scientific, model number BLI-1256-3.8W. 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.