I am currently using a laptop that is approx one year old - it's a toshiba tecra A6. It belonged to a friend and I have only received it recently, so I do not know its history. When I hover above the 'power plan' icon on the bottom toolbar, it says "0% available, (plugged in, not charging)" and, accordingly, cannot run the computer on battery power. Is this definitely a problem with the computer's battery, despite it being only one year old?