This is a high-performance replacement video battery for the Canon LP-E4, guaranteed to meet or exceed the OEM specifications of your original. The video battery is 3.6 x 2.23 x 1.3 inches with an output of 11.1 volts. The chemistry is Li-Ion at 2000mAH capacity. Manufactured by Empire Scientific, model number BLI-347. 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.