This is a high-performance replacement cellular battery for the ZTE N859, guaranteed to meet or exceed the OEM specifications of your original. The cellular battery is 2.18 x 2.21 x 0.217 inches. Manufactured by Empire Scientific, model number BLI-1237-1.5. 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.