Coolgo New Laptop Battery for Battery for Acer Aspire 3690 5100 3100 3102 5610 5610Z 5515 BATBL50L6 BATBL50L8 11.1V 5200mAh Black Acer BATBL50L6H 11.1V 5200mAh Black for laptop battery Acer Aspire 3100 3103 3690 5100 5102 5110 5610 5630 5680 9810 and TravelMate 2490 3900 4200 4230 4280 5210 5510 Series 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.)