i have acer 5536 which was running on windows vista since i upgraded win7 after a while it started showing consider replacing ur battery sign and now my battery only lasts for 10 min fully charged

This. I'm using an Acer 5536 with Windows 7 and my battery never lasts a full 5 minutes without being plugged in.

I bought 2 new batteries and am still getting this message, kk thx plz explain this theory!

Windows told me with a red X and red script that my battery was charged 100% and I should consider replacing it. I removed and reinserted the power cord and ran the cursor over the battery/power symbol which then read "100% charged." True for 5 minutes...first occurrence of the alert, so I guess "we'll see."

This is nonsense. Until a few days ago, my laptop round run for about an hour on a charge. I changed some of my performance settings, then suddenly I started getting the "Consider replacing your battery" error. Now the battery lasts maybe 10 minutes.

I downloaded the "BatteryMon" shareware program and checked the capacity. It said I have 11 watt-hours of capacity out of 47 watt-hours originally. Nothing happened to the battery or the laptop. One day most of the original capacity, the next day less than 25% of the original.

I recently changed my "power plan" and within a week started having this problem.

My laptop is about 9 months old. Before about a week ago I was able to run on batteries for more than an hour. I changed the power plan to even more aggressively reduce power when operating on batteries, hoping to further increase that. The result has been exactly the opposite, and completely disastrous.

Several days ago I received the first "Consider replacing your battery" message. Two days ago I started having problems running off batteries at all. Yesterday I downloaded a shareware program that reports battery health and it shows that the "last full charge" capacity is dropping. The "last full charge" had been 14 watt-hours when I first installed the software. I ran it off batteries for as long as I dared -- 5 minutes -- and when Windows stopped the charger, after replacing the capacity I'd used, the capacity was down to 11 watt-hours (11,243mWh, to be precise). If Windows "knows" the design capacity is 47 watt-hours, why does it report "100%" when the charge is less than 47 watt-hours? 11 watt-hours is 23%, not 100%.

Then I found this article, with Microsoft claiming the problem isn't theirs. I unplugged the charger, surfed the net and watched the state of charge decline. When it reached 50% of the last full charge, the laptop promptly died. I plugged it back in, the "BatteryMon" programs reports the rate of charge and it shows more than 11 watt-hours -- 14 watt-hours again right now. Here's the interesting part -- even though the rate of charge was fairly high, as soon as the charge reached the reported capacity (14,191 mWh), WINDOWS TURNED OFF THE CHARGER. The battery was still accepting a charge, and Windows stopped it. How that's not Microsoft's fault is something they'll have to explain.

http://support.microsoft.com/kb/2293330 'You may incorrectly receive a "Consider replacing your battery" warning message on some older HP notebook computers that are running Windows 7' it can also be caused by a bios issue that results in a misreading of the design charge