-
Get a cheapo battery from eBay and replace it myself
..might want to give this a go even if you would actually buy a new phone; old iPhones are great MP3-players, emergency flashlights, meditation timers, etc.
I did go with "Hagnaven", they weren't the cheapest of them all but had good reviews; replacement was a tad fiddly (don't do it when you're in a rush / just had two coffees), but definitely doable.
OK, battery on my trusty iPhone SE (not the new one) is on the way out, 72% max capacity but it can be on charge all evening and then turn off within minutes of use complaining of 2% battery, then it turns back on and recovers to ~85% within minutes of being plugged in again and then works fine for hours.
Fixing it hasn't been a concern as it mainly sits next to me on my desk all day whilst I'm WFH.
Do I:-
a) Get a cheapo battery from eBay and replace it myself (~£10 or so)
b) Book an appointment at an Apple Store and get them to do it (£49 plus travel faff)
c) Just get a new iPhone SE 2020 on a 2 year contract for ~£24/mo more than my current contract (and moving to unlimited data)
I think I've bought second hand iPhones for the last 6 years or so, so I've saved a boat load over the years. Don't need a new iPhone SE 2020 but they're shiny.