I have a new to me mid 09 macbook 2.13 c2d, 60gb ssd, 4gb ram. Its running 10.10.5 and the previous owner installed an aftermarket battery soon before selling it. He is unsure of its origins, but when I view the battery information in system report, it says the manufacturer is SMP. Cycle count is now 11, condition normal, max mAh 4766. The issue I'm having with it is that from a full charge, it only gets down to around 35% ( I'm not sure the exact number, but I remember the times I've ran it down it gets to the low 40's and stays a few minutes longer) then shuts down. When I flip it over and push the battery indicator, its flashing on 1 dot. I can plug it in, let it charge for 20 minutes and it will be around 20-25% and I can unplug it and use it from that point down until 2% then it shuts down. I thought that would be a battery calibration cycle, going from an actually indicated 0-100% then back down, but it still shuts down in the 35% area from a full charge after that. I've tried resetting SMC with no positive results. Anything else to check or that I can do?