1. Introduction
The Runleader DC 12V to 48V LED Mini Battery Power Indicator is a versatile device designed to monitor battery charge levels for various battery types, including Lead Acid, LiFePO4, and 18650 lithium batteries. It provides clear visual indications of remaining battery power and includes a low battery reminder function to prevent over-discharge.
Key Features:
- Programmable for DC 12V to 48V Lead acid, LiFePO4, and 18650 lithium batteries.
- 5-bar LED display indicating 20% battery power increments.
- Low battery reminder with flashing and solid LED indicators.
- User-friendly one-button on/off operation.
- IP65 water resistance for enhanced durability.
- Easy screw-on installation.

Figure 1.1: Front view of the Runleader Mini Battery Power Indicator.
2. Setup
2.1 Mounting the Indicator
The battery indicator can be mounted using two methods: stick-on or screw-on. Choose the method most suitable for your application.

Figure 2.1: Illustration of stick-on and screw-on mounting options for the battery indicator.
2.2 Power Connection
The indicator supports two types of power connections: direct power connection and key switch power connection. Ensure correct positive and negative polarity when connecting.
- Direct Power Connection: Connect the indicator directly to the battery terminals.
- Key Switch Connection: Connect the indicator through a key switch, allowing the indicator to turn on/off with the vehicle's ignition.

Figure 2.2: Diagrams showing direct and key switch power connection methods.
3. Operating Instructions
3.1 Programmable Battery Types and Voltages
This battery capacity meter is compatible with DC 12V to 48V Lead acid, LiFePO4, and 18650 lithium batteries. You can program the required battery types and voltages through a simple one-button operation. For more specialized parameters like charge/discharge voltage and power display modes, an external programmer (PG600, sold separately) is required.

Figure 3.1: Overview of programmable battery types (Lead Acid, 18650 Lithium, LiFePO4) and voltages (12V, 24V, 36V, 48V).
3.2 LED Battery Level Display
The indicator features 5 green LED bars, each representing 20% of the battery's power. This visual display helps you quickly assess the remaining charge. The LED bars also provide feedback on the selected battery type and voltage during programming.

Figure 3.2: The indicator showing real-time battery power display with 5 LED bars.
3.3 Low Battery Reminder
The device includes a low battery reminder system to alert you when charging is needed:
- When battery capacity is ≤10%, only 1 LED bar will remain lit.
- When battery capacity is ≤20%, 1 LED bar will flash to remind you.
- When battery capacity is ≤30%, 1 LED bar will be lit, and another will flash.

Figure 3.3: Visual representation of low battery reminder states.
3.4 User On/Off
The indicator can be turned on or off by pressing the 'ON' button on its face.
4. Maintenance
The Runleader battery indicator is designed with IP65 water resistance, providing protection against dust and low-pressure water jets. While robust, regular cleaning with a soft, dry cloth is recommended to maintain optimal performance and visibility. Avoid using abrasive cleaners or solvents.

Figure 4.1: The indicator demonstrating its IP65 water resistance.
5. Troubleshooting
If the indicator is not functioning as expected, please check the following:
- Ensure the power connections are secure and correctly polarized (positive to positive, negative to negative).
- Verify that the battery type and voltage programmed into the indicator match your battery system.
- Confirm that the battery itself has sufficient charge to power the indicator.
- If issues persist, refer to the detailed troubleshooting section in the full user manual or contact customer support.
6. Specifications

Figure 6.1: Product dimensions and included accessories.
| Specification | Value |
|---|---|
| Package Dimensions | 2.64 x 1.93 x 1.89 inches; 1.45 ounces |
| Item Model Number | Runleader-* |
| Date First Available | July 20, 2023 |
| Manufacturer | Ningbo Jiangbei Run Leader Electronics Co., Ltd |
| Brand | Runleader |
| Power Source | Battery Powered |
| Style | Compact |
| Color | Black |
| Min. Operating Voltage | 12 Volts (DC) |
7. Applications
The Runleader DC 12V/24V/36V/48V Battery Power Indicator is suitable for a wide range of battery-powered equipment, including but not limited to:
- Golf carts
- Forklifts
- Motorhomes
- Lawn mowers
- Leaf trimmers
- Scrubber machines

Figure 7.1: Visual examples of common applications for the battery indicator.
8. Warranty and Support
Runleader provides excellent after-sales and technical support for this product, including a 2-year warranty. For any inquiries, technical assistance, or warranty claims, please contact Runleader customer service through the official channels provided at the point of purchase or on the manufacturer's website.