Originally Posted by DaleDe
Has the problem repeated itself? Perhaps the battery gauge was not calibrated properly. Generally a few full cycles are required to get the gauge to work properly. Otherwise I would suspect a bad battery.
No, it's only happened once, so I'm not worried much. If it happens again, I'll try and look more into it.
The battery's been charged maybe 3 times or so, so far. I don't know how many times it needs, but anyway the percentages it showes look rather stable most of the time.