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I'm having a problem with my laptop, an IBM Thinkpad T42 (running XP SP3 if it's important) Here's the deal:
I have it plugged into a known good outlet at the hotel I'm staying at. The icon shows it to be on AC power and it currently says 55% remaining (charging) but it is NOT charging and is functioning as if it were on battery power.
I tried the following so far:
1. Restarted computer - no difference
2. Removed battery, unplugged power adapter, and re-booted - no difference
3. Tried removing the battery while plugged into AC power - computer shut off (is it my power supply that's bad?)
How old is the battery? Eventually, laptop batteries stop charging and the only fix is to buy a new battery. Here is a link to a diagnostic utility for the Thinkpad that may be able to confirm that they battery is bad.
Actually it's the same issue with two different batteries; one is the original, and the other was purchased approximately 8 months ago...... symptoms are the same for both.
I'm guessing the odds of both batteries going bad on exactly the same day are pretty limited......
Actually here's an additional update if it helps isolate the issue: I'm now running with the AC adapter, and even though the battery is not charging (it's showing 3%, charging) it's not dropping below the 3% threshold that shuts off my laptop automatically when on battery power. The 3% is at least staying constant rather than continuing to decrease......
Sorry for giving the info bit by bit, but I'm learning as I go.....
It could most likely be due to a wrong AC adapter. Sure it could turn on your laptop but it could not charge the battery. The charging circuit would not even turn on because of the low voltage.
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