Townpeak Laptop Battery For Lenovo IdeaPad G460 G465 G470 G475 G560 G565 G570 L09M6Y02[Li-ion 6-cell 11.1V 5200mAh/58WH]12 Months Warranty

It fits well in my computer (ideapad Z570) and battery power last about 3 1/2 hours with normal use. The only problem is that the battery level shown in Windows 7 task bar sometimes jump from one smaller percentage to a higher one. I tried calibrating the battery with a full discharge and then a full charge but it did not solve the problem.