|Batteries have sensors in them that give the laptop feedback on what is actually happening, this is how you know if the battery is actually charging or not. |
In this case the sensors were malfunctioning, so by default, because it was plugged in, your laptop thought it was charging when it really wasn't.
Keep an eye on the laptop power supply plug in from this point on, malfunctioning batteries often can cause a domino effect and ruin the spot where you plug your power charger in.
Jonas "Jackal" Lear
Serving the South Bay Since 1999