This is a high-performance replacement remote control battery for the Philips 255789, guaranteed to meet or exceed the OEM specifications of your original. The remote control battery is 1.8 x 1.61 x 0.413 inches with an output of 4.8 volts. The chemistry is NI-MH at 750mAH capacity. Manufactured by Empire Scientific, model number RNH-021-.7. 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.