With my Toshiba laptop I had to buy a new battery. If you don’t follow a schedule to keep letting the battery die all the way out once a month, it will not hold a charge.
Yeah, it’s probably the battery. Charging it, when it really isn’t low, can cause it to act like that after a while.
Same thing happened to me. I have a toshiba and this is my 3rd charger. Just buy a universal charger costs 70$. Dont bother calling toshiba.