I am looking for a better/cheaper way to do power-backup in case of blackouts.
Right now it is a PI4 I need to power, and it is powered by a 12V AGM battery (12Ah)
PI4 <-> USB-C cable <-> USB-C car charger <-> 12V car outlet/connecter <-> fuse and wires <-> AGM-battery <-> cheap battery charger
Is there a simpler/cheaper way to convert from the AGM+charger power (12-ish Volts to 13.7 Volts) to the USB-C 15W power needed by the PI4 than by using the "car-parts" that cost and take up space?
