Yes, someone from the Linux community asked something similar. Not to steal their comment but they suggested the use of this board to pair with the CM5 https://www.pi-shop.ch/nano-base-board-a-for-raspberry-pi-compute-module-5 In terms of space saving, that would be a big help. But I do like the pi5 for the micro hdmi plugs, it allows the device to be used as both a “phone” and a desktop. So I’ve gotta think about it some more. Thanks for the suggestion!

See that comment here: https://lemmy.zip/post/53113975/22778634

This is very much in line with what I was thinking, but I have not had the time to test the theory yet. I’ve also considered potentially adding some sort of clock limited state using a GPIO connected switch, but that definitely sounds harder.

Correct, and right now the pi doesn’t actually get any info about the battery. The battery I’m using has an integrated protection circuit and controlled output, so all of the battery management is currently externally handled. Ideally this will change soon, but there are lots of other things that need to change with the battery. It’s not possible to charge the device and have it powered on at the same time, because the battery uses a single USB C connector for both power input and output. And the form factor of the battery is cylindrical, which is also not ideal. Its very much a proof of concept at the moment, I’ve got plans and ideas, but so far, its basically just a pi 5 with a touch screen, plugged into a power bank, with a fancy case

That’s actually the vision I have as well for the device, its basically just a Linux Desktop that fits in an average (cargo pants) pocket, and can do anything a PC can, so in my eyes it is functionally a cyberdeck. The biggest issues with the current configuration are that the UI is a bit tough to use, given the slightly smaller screen size than an average phone, and that it only gets about 7.5 hours of battery life when idling. I’ve already successfully made VOIP calls from the device, though it doesn’t have built in speakers or mics, so you have to use bluetooth or a USB to 3.5 mm adapter.