6V Battery status indicator (OT3600)

Specifications:Working Current: 5-15mA (with backlight)Working Voltage: 6VEnergy Resolution: 1%Voltmeter Accuracy: 1%Using Temperature Range: -20- 70 DegreesWorking Humidity: 10-80% (non-condensing)Black wire connects negative electrodeRed wire connects positiveOuter Dimension: 48 × 29 × 21mmHole Dimension: 45.5 × 26.5mm