One of the many disappointing aspects of the PinePhone is that it would often stutter playing FLACs, something that Rockbox on weaker hardware never did.
They even have see-through faceplates and colored backplates, for those of us still nostalgic for late-90s early-00s see-through electronics in funky colors!
I’ve got some old devices locked into single app mode this way.
Only big issue with replacement batteries is their quality. None of them will be as high quality as original Apple batteries.
The iFlash converter I used was for a single SD card, I was only planning on putting in a single SD card so that's all I got as it was the cheapest, and why not get a big huge battery. However, the SD card slot is taller off the PCB than a microSD slot and iFlash only use them on the multi-card JBOD adapters, that makes it conflict with the larger battery if I wanted to keep the slim casing. So then the options are to get a different iFlash, get a different battery that doesn't go into the SD card area, or as I did a new 'fat' 160GB case.