12V Car Lead Acid Battery Charge Level Capacity Indicator With Digital Display for Cars & EVs

1. High-quality ABS housing, heat-resistant, resistant to deformation, and durable. 2. Dual display of battery level and voltage, providing clear and intuitive information at a glance. 3. Simple wiring, requiring only two wires for connection, making installation convenient. 4. Features reverse connection protection, ensuring no damage even if wires are connected in reverse. 5. Upper 8-segment colour bar displays battery level, lower voltage meter with automatic decimal point adjustment. 6. Wide application range, compatible with lithium-ion battery packs, car batteries, electric vehicle batteries, and other types of battery-powered devices. Product Specifications: Voltage Range: 30V universal model, 7-100V universal model (optional) Display Colour: Red light, blue light (optional) 8-segment battery level resolution: 10%, 25%, 40%, 50%, 60%, 75%, 90%, 100% Voltmeter accuracy: approximately 3% Operating temperature: -10°C to 65°C Operating humidity: 10% to 80% (no condensation) Mounting hole dimensions: 45 x 26 x 18 mm Product dimensions: 48 x 29 x 21 mm The standard model allows you to cycle through battery types by double-clicking the switch button; each double-click advances one level. For details, refer to the detailed diagram. A single click on the switch turns the display on/off. Holding the switch for 2 seconds displays the currently set battery type, after which it automatically resets. Note: 1. The terms '1-cell,' '2-cell,' etc., in the diagram refer to battery packs with a nominal voltage of 3.6/3.7V. The 4-cell iron-lithium battery is compatible with 12V lead-acid batteries, the 8-cell iron-lithium battery is compatible with 24V lead-acid batteries, and so on. 2. The universal model within 30V has a minimum display voltage of 5.8V and a maximum peak voltage rating of 30V. Please note that it must not be used with batteries above 24V! Because the load may generate high surge voltages, which can damage the display. 3. The universal model within 100V has a minimum display voltage of 7V and a maximum peak voltage rating of 200V. Usage instructions: Connect the positive and negative terminals of the display board to the positive and negative terminals of the battery being tested, and the digital display will show the real-time battery level. It has a low-voltage warning function: when the battery has only one bar of charge remaining (12.5%), the light will flash. At this point, it is best to stop using the battery and charge it. Wiring method: Red positive, black negative