This is a high-performance replacement digital battery for the Sony PMW-EX3, guaranteed to meet or exceed the OEM specifications of your original. The digital battery is 2.74 x 1.63 x 3.24 inches with an output of 14.4 volts. The chemistry is LI-ION at 5200mAH capacity. Manufactured by Empire Scientific, model number BLI-439-6.6. 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.