This is a high-performance replacement cellular battery for the BlackBerry RFA90LW, guaranteed to meet or exceed the OEM specifications of your original. The cellular battery is 3.33 x 1.34 x 0.21 inches with an output of 3.7 volts. The chemistry is LI-ION at 1800mAH capacity. Manufactured by Empire Scientific, model number BLI-1273-1.8. 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.