Introduction
The DollaTek Battery Capacity Monitor is a versatile device designed to display battery capacity, voltage, and temperature. It is compatible with a wide range of battery types, including Lithium, Lead-Acid, Lithium Iron Phosphate, and Ni-MH batteries, operating within a 10-100V range. Featuring an LCD color screen, protective cover, and low voltage alarm, this monitor provides essential battery information for various applications.
Product Features
- Wide Compatibility: Suitable for 10-100V (12V, 24V, 36V, 48V, 60V, 72V, 96V) Lithium, Lead-Acid, Lithium Iron Phosphate, and Ni-MH batteries.
- Color LCD Display: Clearly shows battery capacity percentage, voltage, and temperature (switchable).
- Simple Wiring: Two-wire connection (red for positive, black for negative).
- User-Friendly Operation: Two buttons for display mode switching and ON/OFF control.
- Durable Design: Panel with protective cover, dustproof and waterproof surface.
- Safety Features: Input voltage reverse link protection and adjustable low voltage alarm with flashing indicator and buzzer.
Package Contents
- 1 x DollaTek Battery Capacity Monitor (Voltage Monitoring Indicator)
Note: The monitor typically includes the main unit and necessary wiring for connection. A temperature probe may also be included depending on the specific package.
Specifications
| Product Size | 61.5 mm x 33.5 mm x 13.5 mm |
| Installation Size | 58.5 mm x 28.5 mm |
| Display Size | 36 mm x 19.5 mm |
| Operating Voltage | 10V - 100V |
| Power Consumption (LED ON) | 5-6mA |
| Voltage Accuracy | ± 0.1V (typical), ± 0.5V (maximum) |
| Sleeping Power | 6-12uA (at 20V) |
| Operating Temperature | -10°C to 55°C |
| Weight | 10 Grams |
Setup and Installation
1. Physical Installation and Dimensions
The monitor is designed for panel mounting. Ensure the installation opening matches the specified dimensions for a secure fit.

Figure 1: Monitor dimensions for installation. The device measures 62mm in width, 35mm in height, and 15mm in depth.

Figure 2: Front view of the DollaTek Battery Capacity Monitor, showing the LCD display with battery percentage and voltage readings.
2. Wiring Connection
Connect the monitor to your battery using the provided two-wire cable.
- The red wire connects to the positive (+) terminal of the battery.
- The black wire connects to the negative (-) terminal of the battery.
The monitor features input voltage reverse link protection to prevent damage from incorrect wiring.

Figure 3: Wiring diagram for connecting the monitor to a battery. Ensure correct polarity.

Figure 4: The monitor with its wiring harness, including the red and black power wires and a temperature sensor.
3. Battery Type Configuration
The default setting is for 12V lead-acid batteries. For other battery types (Lithium, LiFePO4, Ni-MH, or different voltage lead-acid batteries), you must configure the monitor.
- Enter Menu: Press and hold the blue arrow button (or similar designated button) to enter the setting menu. The display will show "1--L/P/F xx".
- Switch Battery Type: Click the blue arrow button to cycle through battery types: L (Lithium), P (Lead-Acid), F (Lithium Iron Phosphate).
- Adjust Parameters: Press the power button (or similar designated button) to change the numerical parameters (e.g., number of series cells for Lithium, voltage for Lead-Acid).
- Save Settings: After selecting the appropriate battery specifications, press the power button again to save the settings.
- Exit Menu: If no further changes are needed, hold the power button for a long time to exit the setting mode.
Examples:
- L3: 3 series Lithium (4.2V * 3 = 12.6V)
- L4: 4 series Lithium (4.2V * 4 = 16.8V)
- F4: 4 series LiFePO4 (3.2V * 4 = 12.8V)
- F8: 8 series LiFePO4 (3.2V * 8 = 25.6V)
- P12V: 12V Lead-Acid battery
- P24V: 24V Lead-Acid battery
Important: If the selected battery specifications do not match the actual battery, the percentage value may not be accurate. The voltage value displayed will always be the current battery voltage. All parameters must be saved at the last step.

Figure 5: Display showing options for quick battery type changes (L for Lithium, P for Lead-Acid, F for LiFePO4).
Operation
Display Modes
The monitor can display battery capacity percentage, voltage, and temperature.
- Switch Display: Press the blue arrow button (or similar designated button) to cycle through the display modes (Voltage, Temperature, Capacity).
- Power ON/OFF: Press the power button (or similar designated button) to turn the display ON or OFF.
Troubleshooting
Low Voltage Alarm
The monitor features a low voltage alarm to alert you when the battery voltage drops below a set threshold.
- Alarm Indication: When low voltage is detected, a red indicator will flash, and a buzzer will sound.
- Adjusting Low Voltage Threshold: The low voltage threshold can be adjusted in the settings menu. Refer to the "Battery Type Configuration" section for accessing the settings.
Maintenance
The DollaTek Battery Capacity Monitor is designed for durability with a protective cover and dustproof/waterproof surface.
- Cleaning: Wipe the display and surface with a soft, dry cloth. Avoid abrasive cleaners or solvents.
- Protection: Ensure the protective cover is properly seated to maintain dust and water resistance.
Support and Contact
For further assistance, specific battery type settings not covered in this manual, or detailed electronic English instructions, please contact DollaTek customer support.
Note: The manufacturer may provide additional resources or updated instructions upon request.





