Has anyone here done any experiments yet to see what works? I'll get a pi 5 in the mail in the next week, hopefully, and will be trying a couple setups to see what gives voltage warnings and whatnot...
Amp Ripper 4k and 1s pack
4s pack with separate charger and buck converter for the pi.
The buck converter route might work better on the pi5 than previous boards because of it's built in power on/off/suspend controls.
I've always had better luck supplying 5.2v via the 5v pins on the header than I have using the Pi Foundation's PMIC. I'm really looking forward to seeing if they've improved it this time.
I haven't used the header pins much, but there are two solder pads under the USB power plug that I like to solder 5v wires to directly. Same for the USB data pads for any USB devices that go inside the case.