So in August I was having problems with my macbook pro 2011 i7. Before that, it was charging fine. Then, all of a sudden, it started taking up to 6 hours to charge. Furthermore, the light on the charger would sometimes be a dim green and wouldn't charge. Also, when I would lie down with my macbook and move around with it, the charging light would go dim. So, I went to apple and they replaced my charger for free. It was working fine and I did an SMC reset and it was charging fine. Now, every now and then the charger randomly goes dim. Either i'll be at my desk and it goes dim or i'll be on the couch and it goes dim. Could this be the charger since is is only a few months old? Or could there be an internal problem? Thanks for any help.