MacBook shuts down randomly with still battery charge left
Lately my macbook randomly shuts down when working on it. I can work on it for about 2 hours, shut it down, but when I want to start it again later the same day, it will start and immediately after login turn back off. When I try restarting at that point the dead battery sign comes on. I know the battery is not dead, because when I plug the laptop back in, the battery is still at 40% or higher.
I don't know what I have to do, I need my macbook on the go. I'm a repairing guy, but I need tips on where to start looking.
Than again I started looking online, and found out that there is a graphics card return program. Could my macbook be considered under this program with the problems i'm having?
This is how it looks right now after my first discharge and charge
@danj I've done another discharge, and this is the result after.
Maybe i should indeed take the battery off and try that to give the reset.
What tutorial should i follow to do this?