Coolgo New Laptop Battery for 6 Cell 5200mAh Battery for Acer Aspire One ZG5 UM08A51 UM08A31 UM08A71 UM08A726 Cell 5200mAh Battery for Acer Aspire One ZG5 UM08A51 UM08A31 UM08A71 UM08A72 High-Quality Acer Aspire One laptop battery replacement 6 cells 11.1V 5200mAh black for ACER LC.BTP00.017 / LC.BTP00.043 / LC.BTP00.046 / UM08A31 / UM08A32 / UM08A51 / UM08A52 / UM08A71 / UM08A72 / UM08A73 / UM08A74 / UM08B31 / UM08B32 / UM08B52 / UM08B71 / UM08B72 / UM08B73 / UM08B74 / GATEWAY:UM08A31 / UM08A73. 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.)