My offline maps app (MotionX GPS) is still working on my device but does not appear to be available in the App Store any more. I’ll work on finding one that’s current.

Recently, I purchased a larger power bank for the purpose of powering my portable ham radio rig (an Icom 705), along with a Raspberry Pi 400 and USB-C powered screen, for operating digital modes in the field. The weather turned (among other things) so I haven’t operated portable digital yet, but the power bank itself works a treat (https://portableuniversalpower.com/revolt-g2/). The website has some quirks and it took a while for my order to ship, but the device is if anything better than described on their web page. No affiliation with them.