Toshiba Satellite Laptop Trouble
 

i was given a toshiba satellite 1415-S105 a couple days ago and its got a small problem. it works just fine while its on the a/c but wont do nothing on the battery. i was told the battery worked and it shows up in power options as 99% charged online and charging. any ideas on why this thing isnt working? i've tried a different battery with the same results.