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Acer laptop battery won't charge pass 80%

Last response: in Laptops & Notebooks
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August 26, 2011 5:23:00 AM

Hi,

I have a problem with my laptop, it is Acer 4740G, suddenly the battery can't charge pass 80%, I bought it 1.5 years ago, and contacted Acer about this problem, they just quoted service & labour charge which is over $100, battery cost not included..

anyone know how to solve this problem (if possible)?

Thanks!
August 26, 2011 6:12:02 AM

Your battery is old that's the problem. You can recondition it and that might reset the value, but it won't be like new. To recondition it you need to let the battery drain completely and have the comp shut down on its own and then reboot the comp after the battery has a full charge again. At least I think that's how its done, do a search on it if you have questions.
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August 26, 2011 6:17:13 AM

Thanks for your suggestion, I did search on it, but my Acer laptop (or the Windows 7) won't let me disable hibernation on low batteries (limit set to 3%, if I set any lower, it will return to 3%).

Any idea?
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August 26, 2011 10:49:14 AM

Do not fully drain lithium ion battery. Fully drained cell will reverse polarity as safety precaution, the battery protector circuit will short and your battery becomes boat anchor. Just drain it enough until window hibernates and recharge to see if battery recalibrate. If it doesn't, download CPUID HWmonitor and check your battery wear level. 1.5 years with 20% wear is reasonable if you use the battery.
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