I Have an Acer Aspire 5551-2036 that i just bought this august and i recently noticed maybe 2-3 weeks ago that my battery would stop charging at 93 percent and today its 87 percent its a brand new battery because the laptop is still fairly brand new i did a little research and i find out that i maybe have to recalibrate it. but i dont know how. they say let the battery drain to 0% but i cant because windows 7 stops me anybody have any ideas what to do and how to do it. laptop battery's are pretty expensive (well for me)