This is a high-performance replacement laptop battery for the Toshiba Satellite Pro L550-19Z, guaranteed to meet or exceed the OEM specifications of your original. The laptop battery is 11.02 x 1.9 x 1.69 inches with an output of 11.1 volts. The chemistry is Li-Ion at 8800mAH capacity. Manufactured by Empire Scientific, model number LTLI-9179-8.8. 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.