Rafael Pérez

I have this same problem on my iPhone 7 (A1660). I agree with everyone here that the issue is coming from a bad solder joint, so I suggest you either take the phone to a trained person to do the repair or try to do it yourself, but the latter only if you feel comfortable enough to take that risk.

I need to point out here that the replacement battery that I bought here at iFixit for this MacBook Air says that the battery calibration consists on draining the battery below 10%, then charging it uninterruptedly to 100%, but this is not consistent with the battery calibration that appears on this guide. Which one should I follow? Any additional thoughts on this? Thanks.

Just finished doing the feet replacement (using the iFixit replacement parts) on a late-2013 15 inch Retina MacBook Pro and it was just a perfect result. Thank you for this great guide.