Review on ⚡ Beleeb Battery Charger 12V 24V Smart Pulse Maintainer 12V/20A(max) 24V/10A(max) Repair Charger with LCD Display – AGM SLA Car Golf Cart Mower RV ATV, Portable Auto-Volt Detection 2Ah-200Ah by Owen Phi

This is a good charger for the money. I need the 24V range, but it works fine for charging and holding at 12V. I'm not sure if the charge current scale will do anything. It replaces the charging amplifier. Manual mode is not really manual. There must be some current to cause automatic voltage selection. I had to put a good battery in parallel to get the load to see the correct voltage (12V or 24V). I have a 28v lead acid battery and it could pump out 32v at 5.5 amps; impressive for this little charger. It's light, but you can tell it has a transformer and a fan. This is definitely a home model.