This is a high-performance replacement laptop battery for the Toshiba Dynabook AX/55A, guaranteed to meet or exceed the OEM specifications of your original. The laptop battery is 7.91 x 3.43 x 0.87 inches with an output of 11.1 volts. The chemistry is LI-ION at 8800mAH capacity. Manufactured by Empire Scientific, model number LTLI-9245-8.8. 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.