THANK YOU SO MUCH!!!! But does it really do the job when it comes to battery's? I love the Idea of this and it's something I will buy. I've got some regulators here too so if it doesn't handle charging then I will use this for power and a separate board specifically for charging. If it does handle charging then it would be a dream come true. Again TYSM .
The PSU+ does not handle charging, it's only a regulator board. For charging, you could go old school and use a simple 2S cell arrangement, you could try one of the many cheap USB-C BMS modules, or you can use "The Red Board" (which isn't actually red anymore). Before the PMS became mainstream, we'd use 8.4v protection PCBs with 2-4 18650 cells in a 2S arrangement and couple it with a simple barel jack 8.4v smart charger from amazon. You had to give up the idea of charge and play (unless you use a DPDT switch and a second power supply to run the system while the smart charger runs the batteries), but it was cheap and simple to do.
"The Red Board" is another option. It takes in 9v or 12v from a generic dumb power supply to charge the cells (slowly, it only supports 1A charge rate) and supports charge and play natively.
I can't help much with the USB-C BMS modules as I haven't used any of them, but they are an option for charging if you really want to use USB-C.
Any of these used together with the PSU+ would give you functional power to run the portable.