12244
Wireless battery power / wattage Meter
Counts batteries charge and discharge and shows home many percentages left. No complicated wiring needed, just put the negative wire you want to measure trough this device measuring ring
3385
Watt powermeter
The budget wattmeter with the shunt. Counts amps, voltage, and watts goes through its shunt and displays this data. Counts power goes only one way.
1894
Simple battery charge 12V indicator
Simple battery charge indicator with scale and digital voltmeter. For better results recommended to use in rest state. Charging or discharging of battery could shift meter indication.