1. Introduction
This manual provides instructions for the installation, operation, and maintenance of your new DC Battery Voltmeter Capacity Indicator Power Meter. This device is designed to accurately measure and display the capacity and voltage of various battery types, including Lithium, LiFePO4, and lead-acid cells, across a wide voltage range.

2. Safety Information
Please read and understand all safety instructions before operating the device. Failure to follow these instructions may result in electric shock, fire, or serious injury.
- Ensure the device is connected to the correct voltage range (DC 8V-100V).
- Do not expose the device to direct sunlight or extreme temperatures.
- Avoid contact with water or other liquids, unless the specific model is rated as waterproof.
- Always disconnect power before making or changing connections.
- The device features reverse protection, but always double-check polarity before connecting.
3. Product Overview
The DC Battery Voltmeter is a compact and versatile tool for monitoring battery status. It features a clear LCD display and simple controls.
3.1 Components
- LCD Display: Shows battery voltage and capacity percentage.
- 'SET' Button: Used for configuration and mode selection.
- Power Button: For turning the display on/off or cycling through display modes.
- Pluggable Connector: For easy and quick wiring connections.

3.2 Key Features
- 2-in-1 Function: Measures and displays both battery capacity and voltage simultaneously.
- Dual Display: Clear and easy-to-read LCD screen.
- Wide Operating Voltage: Supports DC 8V-100V input.
- Battery Type Compatibility: Suitable for Lithium, LiFePO4, and lead-acid batteries.
- Durable Construction: Made from high-quality ABS material.
- Easy Installation: Designed for quick and straightforward setup.
- Reverse Protection: Built-in protection against incorrect polarity connections.
4. Specifications
| Parameter | Value |
|---|---|
| Voltage Measurement Range | DC 8V-100V |
| Working Current | <15mA |
| Display Mode | LCD |
| Screen Display Color | Color Screen |
| Measurement Accuracy | 1% ± 1 word |
| Measurement Speed | Approximately 2 times per second |
| Working Temperature | -10°C to +70°C |
| Working Humidity | 10-80% |
| Working Pressure | 80-106Kpa |
| Sun Exposure | No direct exposure |
| Installation Size | 58mm x 28mm |
| Dimensions (L*W*H) | 61mm x 33mm x 15mm |
| Package Length | 5 cm |
| Package Width | 4 cm |
| Package Height | 2 cm |
| Package Weight | 0.042 kg |

5. Installation
The voltmeter is designed for easy installation. Follow these steps for proper connection:
- Identify the positive (+) and negative (-) terminals of your battery or power source.
- Connect the red wire from the voltmeter's pluggable connector to the positive (+) terminal of your battery.
- Connect the black wire from the voltmeter's pluggable connector to the negative (-) terminal of your battery.
- Ensure all connections are secure. The device has reverse polarity protection, but correct wiring is always recommended.
- Insert the voltmeter into its intended mounting hole (installation size: 58mm x 28mm).

6. Operation
Once correctly installed and powered, the device will automatically display the battery's voltage and capacity percentage on its LCD screen.
- Reading the Display: The LCD shows the current voltage (e.g., 13.2V) and the battery capacity as a percentage (e.g., 100%) along with a graphical battery icon.
- Power Button: Some versions may have a separate power button to cycle through display modes or turn the display on/off.
7. Configuration and Settings
The 'SET' button is crucial for configuring the device to match your specific battery type and voltage. While specific programming steps can vary slightly between 'Lower' and 'Advanced' versions, the general procedure involves entering a settings mode and selecting parameters.
General Configuration Steps (Refer to specific model instructions if available):
- Enter Settings Mode: Typically, press and hold the 'SET' button for a few seconds until the display changes to a configuration menu.
- Select Battery Type: Use the 'SET' button (short press) to cycle through battery types (e.g., Lead-acid, Lithium, LiFePO4). Confirm your selection by a long press or waiting for a timeout.
- Set Number of Cells/Voltage: For Lithium or LiFePO4 batteries, you may need to specify the number of cells (e.g., 3S for 12V Lithium, 4S for 12V LiFePO4, 7S for 24V, 14S for 48V). For lead-acid, you might select the nominal voltage (e.g., 12V, 24V, 48V).
- Exit Settings: The device usually saves settings automatically after a period of inactivity or by a specific button combination (e.g., another long press of 'SET').
Note on Versions: Some versions, often labeled 'Advanced' or 'With Alarm', may include additional features like temperature display or low-voltage alarms, which can also be configured via the 'SET' button. The 'Lower' versions typically focus solely on voltage and capacity display without these extra features.


8. Maintenance
- Cleaning: Use a soft, dry cloth to clean the display and casing. Do not use abrasive cleaners or solvents.
- Storage: Store the device in a cool, dry place away from direct sunlight and extreme temperatures when not in use.
- Inspection: Periodically check wiring connections for looseness or corrosion.
9. Troubleshooting
- Display Not Turning On:
- Check power connections: Ensure red wire is connected to positive and black to negative.
- Verify battery voltage is within the DC 8V-100V operating range.
- Confirm the battery itself is charged and providing power.
- Incorrect Readings:
- Ensure the device is correctly configured for your specific battery type (Lithium, LiFePO4, Lead-acid) and voltage/cell count. Refer to Section 7.
- Check for loose connections that might cause voltage drops.
- Device Died After Test Starts:
- This could indicate a faulty unit or incorrect initial wiring. Double-check all connections and ensure the voltage did not exceed the maximum rating.
10. User Tips
- Initial Setup: Many users find the configuration process challenging. Take your time to understand the 'SET' button functions for your specific model. If no detailed manual is provided with the product, search online for '6133A LCD Battery Voltmeter settings' or similar terms, often community forums have user-contributed guides.
- Wiring: Always confirm the polarity of your battery before connecting. While the device has reverse protection, consistent correct wiring prevents potential issues.
- Battery Compatibility: This meter is versatile, but ensure your battery type (e.g., LiFePO4, Lithium-ion, Lead-acid) and voltage (e.g., 12V, 24V, 36V, 48V, 60V) are within the device's configurable range for accurate capacity readings.
- Multiple Batteries: If using multiple batteries in series or parallel, connect the voltmeter across the entire battery bank to measure the total voltage and capacity.
11. Warranty and Support
For warranty information, technical support, or further assistance, please contact the seller or manufacturer directly. Keep your purchase receipt as proof of purchase.