[other_os] question about laptop battery

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http://ubuntuforums.org – Hi, I have a friend that his laptop uses windows 7 32bit OS and recently his battery has an error message. saying something that he needs to replace his battery. I played around with it. I took the power cord off and kept the laptop one. it went from 100% full to 75% then to 65% and I plugged the cord back in when it went to 55%. then it stopped at 55% took 3 mintues to get to 75% and then another 4 minutes to get to 85% then took another 5 minutes to get to 99% and then an additional 1 minute to get back to 100%. the whole time it has a red X on the battery icon and if you put your mous (Hardware)