Originally Posted by alykins
no, it should not take 3 days to charge the battery- most likely the problem is not the battery, but the connection port where the AC in powers the battery. I had this happen on 2 of laptops in the past.... unfortunately the answer was "the charging port is mounted on the motherboard, so to fix this you need to replace it. Oh, and that model is discontinued, so please buy a new machine."
it sucks, but aside from taking it apart, desoldering the jack (without overheating the board) and mounting a new one, it's probably the best option.
It could be the battery as well. I've found that cheap replacement laptop batteries are cheap for a reason. They aren't tested for defective cells and usually fail a lot sooner so it is total crap shoot on what you'll actually get.