This is a high-performance replacement digital battery for the Panasonic VW-VBN390, guaranteed to meet or exceed the OEM specifications of your original. The digital battery is 1.6 x 1.43 x 2.43 inches with an output of 7.2 volts. The chemistry is LI-ION at 3500mAH capacity. Manufactured by Empire Scientific, model number BLI-423-3.9. 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.