Antwoord op "CPU slow when battery low!"It looks like the software in iPhone when the battery is replaced with a ‘non-genuine’ battery the iOS reads it as needing serviced even though the battery is brand new. I suspect this to be due to the daughter board/ic in the battery to not have been programmed by Apple. Further to this, I suspect this is Apple’s way of lashing back at the repair community for outing Apple for slowing down older phones with potential battery issues. Not too sure if Apple will rectify this issue, I doubt it as Apple may cite safety concerns as it is a lithium part. The issue thus far doesn’t appear to affect IPhone 5S/6 or Iphone 7 and above, just IPhone 6S strangely. Could be a test bed to see if it’s affecting us.. If you would like to test your batteries without Apple’s beta software in iOS, we use Coconut Battery (Mac) which reads the battery directly and is much more accurate. Gets you a cycle count and a load of other data, very handy.