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6V lead-acid battery pack power indicator board (Blue display)

SKU: FA2192-6
Compatible Battery

6V lead-acid (SLA)
Voltage Range

5.0V – 6.5V
Display Type

LED bar graph (4 levels)
Indication Levels

25% / 50% / 75% / 100%
LED Color

Blue
Power Supply

Powered by monitored battery
Protection

Reverse polarity protection
Module Dimensions

Compact PCB with mounting holes

The 6V Lead-Acid Battery Pack Power Indicator Board is a compact, easy-to-use battery capacity monitor designed specifically for 6V sealed lead-acid (SLA) batteries. It provides a clear, visual indication of remaining battery capacity using a row of blue LEDs, making it an essential accessory for battery-powered projects, emergency lighting, UPS systems, and portable electronics.

The module is designed for 6V lead-acid battery packs with a full charge voltage of approximately 6.3V to 6.5V and a nominal voltage of 6V. It continuously monitors the battery voltage and illuminates the appropriate number of LEDs to indicate the current charge level — typically 25%, 50%, 75%, and 100%. This allows you to quickly assess whether a battery needs charging without using a multimeter.

The module features high-brightness blue LEDs that provide clear visibility in various lighting conditions. The compact PCB design with mounting holes makes it easy to integrate into battery enclosures, control panels, and custom projects. The module operates directly from the battery it monitors, requiring no separate power supply.

Installation is simple: connect the module’s B+ and B- pads to the battery’s positive and negative terminals, and the LEDs will immediately indicate the charge level. The module includes reverse polarity protection to prevent damage from accidental incorrect connection.

The 6V lead-acid power indicator is widely used in emergency lighting systems, UPS backup batteries, solar power storage, golf carts, ride-on toys, alarm systems, and any application where 6V lead-acid battery status monitoring is important. It is also popular in educational projects for teaching battery management and voltage monitoring.

Important Note: This indicator board is designed specifically for lead-acid battery voltage characteristics. It is not suitable for lithium-ion batteries, which have different voltage ranges and discharge curves. Using this module with lithium batteries may result in inaccurate readings.

Whether you are maintaining an emergency lighting system, monitoring a solar storage battery, or adding battery status indication to a portable device, the 6V Lead-Acid Battery Pack Power Indicator Board provides a reliable, cost-effective solution. It is suitable for individual makers, students, and businesses purchasing in bulk for product development or educational programs.

Features

  • 6V lead-acid battery compatibility — Designed for 6V sealed lead-acid (SLA) batteries

  • LED capacity display — Shows charge level at 25%, 50%, 75%, and 100%

  • Blue LED display — High-brightness blue LEDs for clear visibility

  • Direct battery operation — Powered by the battery it monitors

  • Reverse polarity protection — Prevents damage from incorrect connection

  • Compact PCB design — With mounting holes for easy integration

  • Simple installation — Connect B+ and B- to battery terminals

  • Wide application range — Emergency lighting, UPS, solar storage, alarm systems

Technical Specifications 

# Parameter Specification
1 Compatible Battery 6V lead-acid (SLA)
2 Voltage Range 5.0V – 6.5V
3 Display Type LED bar graph (4 levels)
4 Indication Levels 25% / 50% / 75% / 100%
5 LED Color Blue
6 Power Supply Powered by monitored battery
7 Protection Reverse polarity protection
8 Module Dimensions Compact PCB with mounting holes

Usage

Getting Started

  1. Identify the battery terminals — Locate the positive (+) and negative (-) terminals of your 6V lead-acid battery.

  2. Connect the module — Solder or connect the module’s B+ pad to the battery positive terminal and B- pad to the battery negative terminal. Observe correct polarity.

  3. Observe the display — The LEDs will immediately illuminate to indicate the current charge level:

    • 1 LED = 25% or less

    • 2 LEDs = 25–50%

    • 3 LEDs = 50–75%

    • 4 LEDs = 75–100%

  4. Charge as needed — When the display shows low capacity, recharge the battery using an appropriate 6V lead-acid battery charger.

LED Indication Reference

LED Count Charge Level Battery Voltage (Approx.) Action
1 LED ≤ 25% 5.0V – 5.5V Recharge soon
2 LEDs 25–50% 5.5V – 5.9V Monitor
3 LEDs 50–75% 5.9V – 6.2V Good
4 LEDs 75–100% 6.2V – 6.5V Full

Typical Applications

  • Emergency lighting systems — Monitor battery status for backup lighting

  • UPS backup batteries — Check charge status before power outages

  • Solar power storage — Monitor battery level in solar systems

  • Golf carts — Monitor battery level for range planning

  • Ride-on toys — Check battery status before use

  • Alarm systems — Monitor backup battery status

  • Educational projects — Teaching battery management and voltage monitoring

Notes for Business Buyers

  • Essential battery accessory — Provides convenient battery status indication without a multimeter.

  • Simple integration — Connects directly to battery terminals with no additional components.

  • Cost-effective — Low unit cost makes it practical for volume production and educational kits.

  • Suitable for bulk purchasing — Ideal for emergency lighting manufacturers, UPS integrators, and educational institutions.

Q: What is the 6V Lead-Acid Battery Power Indicator Board used for?

It is a battery capacity display board that monitors the charge level of 6V sealed lead-acid batteries and indicates remaining capacity using LEDs.

Q: What batteries are compatible with this module?

It is designed for 6V sealed lead-acid (SLA) batteries with a full charge voltage of approximately 6.3V to 6.5V.

Q: Can I use this module with a lithium battery?

No. This module is designed specifically for lead-acid battery voltage characteristics. Lithium batteries have different voltage ranges and discharge curves, which would result in inaccurate readings.

Q: How many LED levels does the display have?

The display has 4 LED levels indicating approximately 25%, 50%, 75%, and 100% charge.

Q: What color LEDs does this module have?

This module features blue LEDs.

Q: How do I connect the module to the battery?

Connect the module’s B+ pad to the battery positive terminal and B- pad to the battery negative terminal. Observe correct polarity.

Q: Does the module require a separate power supply?

No. The module is powered directly by the battery it monitors.

Q: Does it have reverse polarity protection?

Yes. The module includes reverse polarity protection to prevent damage from incorrect connection.

Q: Can I use this module with a 12V lead-acid battery?

No. This module is specifically designed for 6V lead-acid batteries. For 12V batteries, a different indicator module is required.

Q: Can I purchase in bulk for a product development project?

Yes. This module is suitable for both individual users and business purchasing, including emergency lighting manufacturers, UPS integrators, and educational institutions.

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