This is a high-performance replacement remote control battery for the RTI T1, guaranteed to meet or exceed the OEM specifications of your original. The remote control battery is 1.99 x 1.18 x 0.255 inches with an output of 3.7 volts. The chemistry is Li-Ion at 850mAH capacity. Manufactured by Empire Scientific, model number RLI-010-.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.