Review on 🚗 Zeltauto LED Digital Car Voltmeter: Reliable 12V/24V Vehicle Voltage Gauge Monitor for Auto Car Truck by David Shah

Bought 2 of these a few years ago, now bought 2 more, works great in a motorhome with multiple bus and motor batteries. Use the new ones in my old trucks! Fast reaction to voltage measurement when starting the engine. I measured the 40mA they draw from the battery if left plugged in all the time since they are red LEDs and not LCDs as the name suggests. LCD displays would be much smaller. But it can just be plugged in when needed and easily unplugged to turn it off - if draining in cold weather is a problem. JB, retired electronics teacher