This is a high-performance replacement two-way battery for the Bullard TI Commander, guaranteed to meet or exceed the OEM specifications of your original. The Bullard Thermal battery is 3 x 2.5 x 1.25 inches with an output of 10 volts. The chemistry is NiMH at 2150mAH capacity. Manufactured by Empire Scientific, model number BNH-5447TIC. 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.