Chosen Solution
I followed the instructions in the ifixit but when it came to removing the sticky strips, they both tore (quite easily). I can’t budge the battery, so this looks like I’ve wasted my money on a repair kit. Any advice would be appreciated.
Insert a credit card from the LOWER LEFT side of the battery and try to shovel it up, just as much as you can access the broken stud of the adhesive tab and continue to pull. Do not insert from upper left or the right side as the ifixit guide may suggest. You can damage components underneath.
Also, use an iOpener.
When you say “lower left”, what is that relative to? The bottom (short side) of the iphone? Thanks