This is a high-performance replacement video battery for the Panasonic PV-DV400K, guaranteed to meet or exceed the OEM specifications of your original. The video battery is 2.35 x 1.43 x 2.1 inches with an output of 7.2 volts. The chemistry is Li-Ion at 3000mAH capacity. Manufactured by Empire Scientific, model number BLI-172-2.8. 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.