This is a high-performance replacement two-way battery for the HYT BL1204, guaranteed to meet or exceed the OEM specifications of your original. The two-way battery is 4.03 x 2.17 x 0.69 inches with an output of 3.7 volts. The chemistry is LI-ION at 1200mAH capacity. Manufactured by Empire Scientific, model number BLI-1204. 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.