This is a high-performance replacement laptop battery for the Dell RU586, guaranteed to meet or exceed the OEM specifications of your original. The laptop battery is 8.69 x 2.66 x 0.92 inches with an output of 11.1 volts. The chemistry is LI-ION at 8800mAH capacity. Manufactured by Empire Scientific, model number LTLI-9242-8.8. 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.