My Iphone6s battery was not holding it's charge
I took my time removing the screen, don't get to aggressive. Hardware removal went fast, I'm glad I had my 2.0 magnifiers to see. Battery adhesive strips were a pain in the butt. But I took my time. Had to break out the blow dryer to heat up the case and battery and then slowly pried that sucker out.
Take your time, have a sip of bourbon, just a sip to calm the nerves