The battery is in sight! - keep in mind that without a heat gun (or very least hair dryer), this step will be impossible, as the adhesive that secures the battery to the back of the phone is very strong

Before removing the battery, make sure that the two ends connecting the battery to the frame have been disconnected from the frame

I found it easiest to remove by getting in between the gap with some tweezers and pulling the tape up so that it disconnects.

You can keep the majority of the tape on the battery untouched, but eventually you will have to take it completely off the old battery and transfer onto the new one.