This is a high-performance replacement vacuum battery for the Dyson 917083-02, guaranteed to meet or exceed the OEM specifications of your original. The vacuum battery is 4.72 x 2.95 x 2.63 inches with an output of 14.4 volts. The chemistry is LI-ION at 1500mAH capacity. Manufactured by Empire Scientific, model number VLI-105. 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.