This is a high-performance replacement video battery for the Empire DVU-SAM1 R1, guaranteed to meet or exceed the OEM specifications of your original. The video battery is 4.23 x 2.3 x 0.82 inches with an output of 3.7 volts. The chemistry is Li-Ion at 730mAH capacity. Manufactured by Empire Scientific, model number BLI-305. 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.