Windows 7 Shutting Down Laptop At 50% Battery?

Mar 22, 2011

I have a brand new battery in an Acer travelmate 5720. It has a BRAND NEW battery in it. at 50% power, the laptop dies as if the battery is totally drained. Will not even post to bios. Just dead.I adjusted the settings for the battery in windows to alert and shut down the computer at 50% to save whataver data is there, but this is not a good fix. There are no settings in the bios for adjusting the battery. What is going on in windows to cause this?I've read thru the threads and saw a lot of people with this problem only to be told that it's their battery or the laptop, and blah blah blah. Anything but Windows 7.

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My laptop just wakes up from Sleep, while on battery. It's soooo annoying! I have this info from a CMD command. Maybe, it's relevant?

Info: Command I entered on Command Prompt: PowerCFG -LastWake .

Result:

Wake History Count - 1
Wake History [0]
Wake Source Count - 1
Wake Source [0]

[code]...

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I haven't verified this yet, but I wondered if it's a possible bug?

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Technical information: *The factory battery (OEM) is a Sanyo AS07B31 (lithium Ion, 4400mAh, 48Wh, 10.8V, 6 cell). *The replacement battery is a Famis FAM18674 (Lithium Ion, 5200mAh, 49Wh, 14.8V, 8 cell)

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Additional Details:One other person has submitted that the original battery that came withthe laptop contained DRM electronics, so that one cannot replace the OEM battery with a non OEM model.

Additional Details The battery status/plugged-in status icon is on the taskbar and is not hidden. I have always had my taskbar set up to show all icons and to hide none of them. With the laptop not plugged into the AC and the new battery in place, the only icon that is showing is the "no battery detected" icon. Even though the laptop is drawing power from the battery, Windows does not "see" that there is a battery and therefore cannot provide battery usage/time remaining, etc.

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