So I have this Acer Travelmate and I'm having a huge problem with it. Back then it dies when it reaches 50%. Without any warning. And after a few months it went up into 60% and just earlier this week, it constantly dies at 70%. I'm not able to use it for a long while and the thing is it charges fast (assuming that because it still has a lot of battery charge but it just dies). I'm not using this on a daily basis so I have not abused this or whatsoever. Can you guys help me?