The instructions were good. Didn’t take long to do, once I had the right tools (I bought a Torx T5 driver, as the tool included with the aftermarket battery was the wrong size; the seller credited the cost of it back to my purchase). The connector was the *only* other challenge: getting it properly lined up & seated.

Oh, I didn’t have a spudger handy. I used a plastic knife, worked fine. The adhesive was double-stick tape.

Phone is charging & rebooting right now. Total cost, $13.52, including tool, tax & shipping.