I have a Dell Inspiron 1525 with a 90W adapter. A few months ago, I noticed that it couldn’t charge but would work fine otherwise when plugged in. At startup I get a message about the adapter being unrecognized. After leaving town for a few days without the laptop, I came back and plugged it in again and found that it was charging and I didn’t get the message.
At about 50% full, I unplugged the adapter, moved to another room/outlet, plugged it again, and found that it would no longer charge. I’ve since found that I can only charge the battery if the adapter has been unplugged for about 24 hours (maybe more) before trying to plug it in again.
Can anyone tell me if this sounds like a problem with the adapter, the battery, the BIOS, or the power distributor?