My mini draws about 40-50w at start then stabilizes at 25w-30w at steady state. I put mini in my backpack next to my laptop with a 86Wh power brick and go hiking.

Phone now has satellite that makes me reachable. In case of emergency I bust out the mini and the laptop and I join the bridge.

This is not in theory, I actually joined emergency calls a few times.

Probably don’t need mini2 at this time. It only removes the power brick for me.