14 Pro Max at 88%. I’ve never had battery health degrade this quickly on previous iPhones, and I’ve had every iPhone since the 6. I don’t recall percentages on my XS and earlier, but I know that my 11 Pro Max was at 99% when I got my 12 Pro Max, and it was at 98% when I got my 13 Pro Max. My 13 Pro Max was at 93%, when I got my 14 Pro Max, and the only thing that’s been different in terms of my charging behaviors is that I’ve used MagSafe charging much more. Maybe the heat wireless charging creates is worse on batteries, but I’ve read others using MagSafe not have this problem, so I really don’t know unless Apple has tweaked the way they report battery health.
EDIT: Now I’m at 86%. It’s dropped 2% in a little over 2 weeks.
3D printing has become really accessible over the past few years. Many affordable entry level printers come with automatic bed leveling and direct drive extruders, which previously only came on more expensive printers. IMO, it sounds like your use case is perfect for 3D Printing. There’s a variety of great entry level printers you can pickup right now for fairly cheap. I don’t have experience with them myself, but the Elegoo Neptune 3 or 4 seem to be well regarded for their price point. As far as getting started, Thomas Sanladerer has a great intro to 3DP that can get your started on the concepts. It’s not hard to pickup. https://youtube.com/playlist?list=PLDJMid0lOOYnkcFhz6rfQ6Uj8x7meNJJx