This is a high-performance replacement vacuum battery for the Euro Pro Shark VX1, guaranteed to meet or exceed the OEM specifications of your original. The vacuum battery is 2.44 x 1.77 x 0.47 inches with an output of 4.8 volts. The chemistry is NIMH at 2500mAH capacity. Manufactured by Empire Scientific, model number VNH-108. 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.