9 Cell Ultra High Capacity battery, compatible with follow models: Acer Aspire One 11.6" 751, 751h, AO751, AO751h Series, Acer Aspire One ZA3 ZG8 531 SP1 Series. Compatible part# UM09A31, UM09A41, UM09A71, UM09A73, UM09A75, UM09B31, UM09B34, UM09B71, UM09B73, UM09B7C, UM09B7D. We guarantee our products will exceed expectations and deliver the best product quality performance. All of our batteries comply with ROHS and CE quality testing standards. We have liability insurance coverage for any product damages up to $3,000,000 USD so you will feel at ease with buying from us. We understand the annoyances of dealing with defective products, thus we make sure to offer only the best products available. Buy with Confidence!