I found iFixit guides very easy to follow. https://www.ifixit.com/Guide/iPhone+6+Battery+Replacement/29363 https://www.ifixit.com/Guide/iPhone+6+Battery+Replac

I found iFixit guides very easy to follow. https://www.ifixit.com/Guide/iPhone+6+Battery+Replacement/29363 https://www.ifixit.com/Guide/iPhone+6+Battery+Replacement/29...