The instructions for replacing the battery were mostly fine - the most difficult part I found was separating the display from the case using the suction cup, but with perseverance I succeeded.

The problems started after I powered the 6S with the new battery. My iPhone 6S is running iOS 15.0.1 at the time I write this. I didn’t heed the warning of doing a forced restart and I think that caused a lot of problems performing a battery calibration. The battery status initially said maximum capacity at 100% but then it started to randomly reboot and said the battery needs service. Battery indicator would jump between 5% and 15% and the UI/keyboard was really laggy. I eventually wrangled the 6S in a state where I could consistently charge the battery to 100%+2 hours — watching CoconutBattery show the charging information. I have yet to drain it, but it looks like it’s holding a charge now and it’s taking forever to drain on idle (which is good!).

So heed the warning, force restart your phone. And bat calib is finnicky

Here is an actively maintained compendium of this issue: http://a1502-2015-macbook-pro-13-trackpa...

I urge anyone having this issue please contact https://appleissues.net/ and let them know that this is a widespread well known issue that Apple has not acknowledged and link to above.

Hi mapercortesia - can you please let https://appelissues.net/ know about the issue and please cite this compendium that is collecting as much information about the issue: http://a1502-2015-macbook-pro-13-trackpa...

Hey mapercortesia. I actually paid Apple to replace the cable. I tried to replace it myself with one off eBay and it worked except for haptic feedback / clicking.

I can’t work on a crippled device so I took it to Apple immediately. I didn’t bother to check if others had the haptic feedback issue with replacement cable, but that is indeed the case. And there’s 2 part numbers for the cable (one is a revised one that Apple tries to remedy the issue with - but still fails).

Under Australia Consumer Law Guarantee a product must be of acceptable quality free from defect and fit for purpose (e.g. you can use keyboard & mouse). This trackpad cable is, as you say, a design flaw and not durable and fails that test. However this law only applies for products with a reasonable lifetime expectancy. Apple in Australia uses only two factors on deciding reasonable lifetime: (1) when the fault happened and (2) the age of the product.

Apple says: “your laptop is 4 years old, which is 12 months older than expected lifetime”.