This is a high-performance replacement digital battery for the Panasonic HDC-SDX1, guaranteed to meet or exceed the OEM specifications of your original. The digital battery is 1.7 x 1.2 x 0.91 inches with an output of 3.6 volts. The chemistry is LI-ION at 1700mAH capacity. Manufactured by Empire Scientific, model number BLI-400-1.8. 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.