>I used to have a Dell laptop which had exactly the same problem with my first battery. Running laptop plugged into AC adapter 99% of the time was one reason fo

>I used to have a Dell laptop which had exactly the same problem with my first battery. Running laptop plugged into AC adapter 99% of the time was one reason for that happening, I imagine. Except Dell laptops have a configuration in the BIOS to better handle to be always plugged. I changed this BIOS option, and it basically never uses or charges the battery unless AC is off. So, the fix is even more ridiculously simpler than you thought.