This is a mini digital battery capacity tester for 12V/24V/36V/48V lead-acid battery and 3.7V lithium battery and 3.2V Fe battery with polarity reverse protection and low battery indicator. Colorful LED display to monitor the battery status timely, which is easy to read the value in dark environment with the green/blue/white backlight. Widely used for cars, motorcycles, scooters, bikes, power bank, test equipment, etc. Feature Wide Operating Voltage Range: It can be operated within DC 6-63V Bright LCD Display Low Power Consumption: It owns clear and LCD display with white/green/blue backlight. However, this monitor needs low power consumption. Fit for Various Battery Specification: The battery capacity reader is suitable for 12V/24V/36V/48V lead acid battery, 3-15series 3.7V lithium battery and 3.2V Fe battery. Widest Application: This functional battery detector can be applied to various instruments and meters; portable device; power bank; medical device, electrombile, self-balance car. Specification Model: GY-6S Color: Green Material: PCB and HTN. Backlight color: Green /Blue /White Screen size: 43 x 11.3mm / 1.69" x 0.44" Voltage range: 6-63V Circuit load current: 5 - 6mA Suitable for: 3-15pcs 3.7V Lithium Batteries; Lead Acid Batteries 12V, 24V, 36V, 48V; 3.2V Fe Batteries3.2V Fe Batteries Dimensions: 61.3 x 33.3 x 13.5mm / 2.41" x 1.31" x 0.53" Mounting hole Size: 58 x 28.1mm / 2.28" x 1.11" Wire Length: 30cm / 11.8"