Ok, so I purchased a replacement logic board for my MacBook Pro 11,3. Original MacBook Pro ran High Sierra. Swapped the...

Hello, Note: To Forum sysadmin, I typed up my question on the US web side, and when I logged in was redirected to the FR...

This is a picture of my iFixit Battery’s health. I installed it about 2 years ago, this battery is absolutely not cared for (either always on the brink of shutdown or constantly plugged-in for months on end. I only have lost 5% in those 2 years and across 102 charge cycles… Pretty good if you ask me. It did put more life in that old, but reliable machine.

Hello, I bought my replacement battery for that same exact laptop on here. The first battery dropped very quickly in terms of performance, and as I monitored it via coconutbattery I was able to see that something was not right but I was too lazy / busy to take care of it. Eventually I started to have random shutdown problems - most of which experienced when the MacBook Pro was running off the internal battery (not on AC). I contacted ifixit (a year after, mind you), and they sent me a new battery as a replacement. In other words your mileage will vary, but if you go to a reputable source, they should stand behind their products. Sure, you will have to spend the time cleaning it and getting rid of the adhesive (you get better the second time around btw, hint: do not use acetone, use some light scraping with a strong plastic sprue, and use painter tape to remove the remaining residue), but in the end this is the cost of DIY. As a side note, I should have qualified under Apple’s coating recall but the Genius...

So, that seem to have done the trick: https://outluch.wixsite.com/rmbp-crash High Sierra is really a piece of half-assed software, wish I could stay with the vastly more stable Sierra but my time machine backup are of course, not compatible.