Dead battery. i have a digital mp3 player, and i have been charging it for more then 2-3 hours and

Question

i have a digital mp3 player, and i have been charging it for more then 2-3 hours and the battery still says the same amout of life as it did before i charged it. (which is close to dead.) im just wondering if there is anything i can do to fix it. i dont now the model... i got it a year ago from walgreens. and i just really started using it like 3-4 days ago. this started like the night before last.