Why does my Toshiba laptop battery run out so quick?

-My toshibas battery runs out pretty fricken fast! it's annoying because its about to die right now!it is old

or you leave it in your computer all the timeIf you have had it for a while this may be less likely to fix it. But, if it's under a year old this will probably work. Turn it on unplug and wait for it to die. Then charge it and while it is use it. Do that. That's how you should use a laptop. Use it on charge when its almost dead and when it's full use the battery.
how old is it?

batteries just get bad over time.