I own an Alienware Sentia m3200. Before recently, the battery held a charge for about 4 hours of use. Now it rarely hits even 30 minutes. I think that it must have gone bad, and am prepared to buy a new one, but... Is there any chance that this could be any other thing? Any at all? Because I sure can't go spending this money for nothing. Thank you very much to all who can help me out.