Toshibal laptop not charging past 80%

ReadyToGo wrote:
How would one know if they have a battery problem if only used 2 percent of the time and plugged in the rest of the time? Because the battery is being charged all the time it is plugged in, if it wouldn't hold a charge, it would fall below 100 percent even while plugged in.
As you might know, there is a battery charge icon available that shows the status of the battery.
It used to be that some laptops wouldn't boot if the battery was at 0 or missing. I don't know if that still happens, and I don't need to know but that would have told anyone that the battery was bad.
Also, since the laptop does move occasionally, it would show up then. For instance, right now we are traveling every day, and use the computer once in a while on battery.

I would just like to add to your post here that not all laptops work the same way as yours. My Asus when plugged in only charges the battery when it drops below 95%. Right now indicator states "96% available (plugged in, not charging)". When the battery drops to 94% or lower it will read "94% (example), plugged in, charging".

If someone were to continue to leave the laptop plugged in, almost never using unplugged like their old desktop computer, eventually a number of years down the road the battery will loose capacity to the point that the laptop may start but the battery is so low that the computer may shut down within a few minutes. It may do this for more cycles looking like a program, or CPU, problem which may go undiagnosed.

At this point a new battery (after being fully charged) may have solved the problem.