Review on 💡 SMAKN 0.56-inch 2-Wire Blue DC 3.0v-30v LED Panel Digital Display Voltage Meter Voltmeter by John Hall

Bought two of these to keep track of two car batteries. My cars stood still for weeks last year. I didn't start three times because of a dead battery. So I bought two 1 amp chargers to keep the batteries going. Chargers only have LEDs, no gauges. So I wanted to control the voltage of the batteries while charging. For the price they are great. The accuracy of both is within 100mV. They don't last long, but they do what they're supposed to do. So for a cheap meter I think they work well. They are easily worth what I paid for them.