This is a high-performance replacement two-way battery for the Kenwood 21003100, guaranteed to meet or exceed the OEM specifications of your original. The two-way battery is 4.34 x 2.38 x 0.81 inches with an output of 7.2 volts. The chemistry is NiMH at 2000mAH capacity. Manufactured by Empire Scientific, model number BNH-KNB15. 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.