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Lazyweb: if I want to power a smallish USB-c pi-like device in a way that provides it with clean power and very modest but reliable battery backing, what is our preferred way of doing that?
@mhoye Does it need to be able to negotiate USB PD, or is just having 5V at 2.1A or whatever you get with the data lines tied sufficient?
@dalias I believe that I need negotiation up to 15v, target is a small risc device.
@mhoye I have this on order from Ali https://www.aliexpress.us/item/3256804201390760.html which supposedly gives up to 20V and can be used with a wide range of input (battery) voltages. You'd have to supply the battery and charging side separately. You can check back in a week or so and see my findings on whether it's actually decent.
@scruss @mhoye No charging is actually the selling point to me. I don't trust anything that integrates the charger not to disrupt output re-negotiating PD when the charging input status changes. And that would reboot the device I want UPS on and break the whole point of "uninterruptible" backup power.
The charging side can be handled by putting a cheap BMS on the battery.