Hi
This is normal condition, nothing wrong.
This is Toshiba laptop on charging the battery.
Having tested before, see below.
To charge battery, you have to connect to the main power adapter then switch on.
When you are using battery only, and find the battery level % is going down.
You need to shutdown the laptop first.
Then connect the main power adapter to the laptop.
Finally, turn on the laptop.
In this way, the battery will be charging.
I did encountered this not once, but most of the time, if i use battery to start.
I did panic as i was using battery only.
Encountered this, when the laptop shutdown without warning.
Send to the Toshiba service center, and the staff said no problem, required power adapter.
Following to this incident, then confirm by testing.
Using the battery to turn on the laptop.
Battery & level drop, connect the main power adapter to the laptop.
It do not charge, but keep using the battery as power, and it just SHUTDOWN without warning.
Now having 3 Toshiba laptop, as i know how this work.