Review on ⚡️ DROK DC 4.5-100V LED Voltage Current Display - Digital Voltmeter Ammeter Multimeter Panel for Automotive Motor Battery - 0-50A Volt Tester Meter Amp Detector - Voltage Amperage Monitor Gauge by Rick Ross

Does exactly what I wanted (measure battery current in my camper) but I had to 'interpret' the circuit a bit to get what I wanted. Now it's built into the camper and will display battery voltage and current 0.00 when the battery is discharged and when external AC power is applied it will display the charge voltage and current as I had hoped. Excellent! I don't know if the current reading for ma is accurate, but it suits my needs and shows 0.00 when the battery is fully charged. this is not what i was looking for. However, it would be nice to have one. It's going to be 'operationally' tested next weekend and I need to determine if the display is bright enough to also need a switch. Very satisfied with the product.