Phone is from Nov 2015, 3 years and half. Battery become bad in duration and bulky, it become a balloon. Was a good battery, 3 years ok, take much use really.
The battery help because became a balloon and open half back. The front was my fault, i forget to use heat and the borders now have a weird color, i dont care but is no ok. The guide help a lot.
If you battery is bad do no wait it to become a balloon because you can not use the heat tool and you end damaging the borders trying to open it. ALL of the corners have strong glue and you broke the paint in the back of the screen, it works but look awful.