This is a high-performance replacement remote control battery for the Marantaz TSU5002, guaranteed to meet or exceed the OEM specifications of your original. The remote control battery is 2.18 x 2.25 x 0.6 inches with an output of 4.8 volts. The chemistry is NIMH at 1800mAH capacity. Manufactured by Empire Scientific, model number RNH-023-1.8. 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.