I got a small Victron charger for my LiFePO4 batteries, it costs about five times of the nobrand equivalent charger I already owned, but it has Bluetooth and upgradable firmware, it's understandable I fell for it like a sucker.

It spews wideband EMI across the entire RF spectrum I'm interested in, so that's great.

It made me rethink what I thought I knew about charging these batteries, 14.6V as a target voltage for a 4S1P might not be the best idea after all, I'll settle for 14.2V