This is a high-performance replacement vacuum battery for the NESTOR H.Koenig Swr22, guaranteed to meet or exceed the OEM specifications of your original. The vacuum battery is 3.54 x 2.67 x 1.65 inches with an output of 14.4 volts. The chemistry is NIMH at 2500mAH capacity. Manufactured by Empire Scientific, model number VNH-103. 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.