This is a high-performance replacement video battery for the JVC GR-DVL820U, guaranteed to meet or exceed the OEM specifications of your original. The video battery is 2.17 x 1.47 x 2.17 inches with an output of 7.2 volts. The chemistry is Li-Ion at 2200mAH capacity. Manufactured by Empire Scientific, model number BLI-192-1.6. 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.