I have a 4.5 year old Macbook Pro. 2 months ago I changed the battery to a brand new battery. I am still having a problem. After about 1 hour it goes down to 39% charge remaining and the laptop goes into overdrive at that point in terms of the fan and the heat generated at the bottom of the laptop enclosure and then the energy depletes at a fairly rapid rate from that point on. The bottom of the laptop is getting fairly hot. This is not normal. What do you think is the problem and how might I solve it? Should I just get rid of the laptop and buy a new one?
I had this same problem before I purchased the new battery.\