This is a high-performance replacement video battery for the Panasonic PV-GS31, guaranteed to meet or exceed the OEM specifications of your original. The video battery is 1.63 x 1.42 x 1.18 inches with an output of 7.2 volts. The chemistry is Li-Ion at 1400mAH capacity. Manufactured by Empire Scientific, model number BLI-230-1.4. 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.