This is a high-performance replacement remote control battery for the Universal Battery MX-3000, guaranteed to meet or exceed the OEM specifications of your original. The remote control battery is 2.55 x 2.31 x 0.19 inches with an output of 3.7 volts. The chemistry is Li-Pol at 2100mAH capacity. Manufactured by Empire Scientific, model number RLP-008-2.1. 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.