Coolgo New Laptop Battery for ACER Aspire One D255 D260 AL10A31 AL10B31 AL10G31 Black - 18 Months Warranty [li-ion 6-cell 5200MAH 11.1V] Acer Aspire One D255 D260 722 battery AL10A31 AL10B31 AL10BW AL10G31 replacement 5200mAh 11.1V 6Cells Quality Certication: All the products pass the ISO9001, CE and ROHS, FCC multiple international authentication and completely accord with environmental protection requirement. Consummate Design: Excellent design makes the product not only has the overcharge, discharge and short circuit multiple protection, but also to balance charge-discharge of all the internal cells. Environmental Test: Standard modern assembly line. All products have passed a variety of charge-discharge and aging test before they leave the factory. 100% quality test for all items. Operation time: For standard battery(6-cell, 4400mah): 2-3 hours; for extended battery(12-cell, 8800mah): over 4 hours (Note: The actual operation time depends on how much electricity is required by the device and how you use the battery.)