This is a high-performance replacement laptop battery for the Acer Aspire One 571, guaranteed to meet or exceed the OEM specifications of your original. The laptop battery is 8 x 1.16 x 0.82 inches with an output of 11.1 volts. The chemistry is Li-Ion at 2200mAH capacity. Manufactured by Empire Scientific, model number LTLI-9144-2.2. 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.