Review on 🔋 Outerman 12V 24V Lithium Battery Charger - Automatic Smart Maintainer for Car, Boat, Motorcycle, Lawn Mower - Lead Acid or Lithium Battery - 6AH~105AH Capacity by Brandon Reid

If you are looking for a 12/24v automatic charger that only works when plugged in then this is for you. made of metal. The jumper cables are a little short, but you can plug it in without AC power and it works as a battery voltage monitor, and with AC power it charges/supports just fine. I think it's making 4 to 8 amps all the time. there are no buttons for 24v, as i said, everything works automatically. I use a bnlink wifi power plug with it so I can turn it on and off with my phone. :)