Brand New BattPit 11.1 Volt 4400mAh 49Wh Li-ion Battery. 1 Year Replacement Warranty on all BattPit Products. 30 Day Money Back Guarantee. Orders ship out in 1-2 business days.This battery is not compatible with the following Aspire One models: Aspire One D257 Series, Aspire One D270 Series, Aspire One 722 Series.The battery will protrude out the (bottom/side) of the laptop and will cause your laptop to sit at an angle. You may not be able to connect to a docking station with the extended battery.Compatible with the following Acer/Gateway models: AC700-1090, AC700-1099, AC700-1529, Aspire One 522, Aspire One D255, Aspire One D255E, Aspire One D260, Aspire One D260E, Aspire One Happy, Aspire One Happy2, LT23, LT2304c, LT2315u, LT2316u, LT2318u, LT2319u, LT2320u, LT2321u, LT2503u, LT2514u, LT2523u, LT2525u, LT2526u.Compatible with the following Acer/Gateway part numbers: 31CR17/65-2, AK.003BT.071, AK.006BT.074, AL10A31, AL10B31, AL10BW, AL10G31, BT.00603.121, LC.BTP00.128, LC.BTP00.129.