call me an idoit, call me a redneck who knows nothing about computers (which in a way is somewhat true) but please give me a hand.

i left my computer cable at my grandpas house for a week so my laptop went dead of course and now that i have the cable back it wont charge the comp only keeps it running at 1%. ive click on buttons and looked into the battery area and it just says its not charging only plugged in. soo could someone give me a hint on what to do? i would appreciate it.