This is a high-performance replacement two-way battery for the HYT TB-61, guaranteed to meet or exceed the OEM specifications of your original. The two-way battery is 2.09 x 1.67 x 0.58 inches with an output of 3.6 volts. The chemistry is NI-MH at 1300mAH capacity. Manufactured by Empire Scientific, model number BNH-TC1688. 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.