Gauging interest in making new alternator voltage regulators

I see talk of different batteries needing different charging controls, but no explanation. Add that people are beginning to use lighter Li 12 VDC batteries, the only hindrance being price (>$600). There are various Li types. When I replaced the lead-acid batteries in my daughter's razor scooter with LiFePO4 (LFP) type, I had to buy a different charger since they like ~17 VDC vs ~14 VDC for lead. But, the auto Li batteries may be designed more compatible. Not sure how the Vreg would better match the battery. You can't go higher on charging voltage, since that can damage other consumers, like burn out the headlamps. Do you mean controlling the output current instead?

Re price, hard to beat the Vreg I bought for my 1965 Chrysler, $11 for early one field wire alternator (grounded field). It doesn't look OE, rather a thin chrome box more like the later Mopar Vreg, but w/ early connectors. Probably made in China, but what isn't today? But I'm changing my early Mopars to the later square-back alternator for more output current since TBI and radiator fans. I have a bag of 1970's two field wire Vregs (triangle connector) for them, though can also use a 1-wire Vreg with them (just ground one field wire). I mount the Vreg on the inner fender beside the alternator. Not sure why Mopar ran wires all the way to the firewall.