This is a high-performance replacement cellular battery for the Samsung GALAXY MEGA 4G, guaranteed to meet or exceed the OEM specifications of your original. The cellular battery is 3.44 x 2.57 x 0.195 inches with an output of 3.8 volts. The chemistry is LI-ION at 3200mAH capacity. Manufactured by Empire Scientific, model number BLI-1369-3.2. 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.