This is a high-performance replacement remote control battery for the Crestron SmarTouch 1550, guaranteed to meet or exceed the OEM specifications of your original. The remote control battery is 4.12 x 2.23 x 1.16 inches with an output of 4.8 volts. The chemistry is Ni-MH at 3600mAH capacity. Manufactured by Empire Scientific, model number RNH-014-3.6. 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.