@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.
@RealGene OK, ordered a couple of these modules. https://www.aliexpress.us/item/3256804201390760.html 🤞
I'll try powering modem with one and see if it works, and add battery once I confirm what voltages it accepts. Even if not, it should make a great phone charger or even laptop power supply. 🤷
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