Best 80-something € spent so far were on a new battery set https://eustore.ifixit.com/en/Parts/MacBook-Parts/Macbook-Pro/15/Retina/Late-2013/MacBook-Pro-15-Reti

Best 80-something € spent so far were on a new battery set https://eustore.ifixit.com/en/Parts/MacBook-Parts/Macbook-Pro/15/Retina/Late-2013/MacBook-Pro-15-Retina-Late-2013-Mid-2014-Battery.html https://eustore.ifixit.com/en/Parts/MacBook-Parts/Macbook-Pr... Cost me 2 hrs and some bruised fingers but I'm good for years. And if Apple hasn't amended this disaster when this battery fails, I'll replace it again.