LED Voltage and Battery Capacity Display Board | DC 7-55V Universal Smart Battery Charge Indicator with Low Voltage Alarm

Monitor your battery voltage and capacity in real time with this universal smart battery charge indicator board. It works with a wide range of battery types and voltage levels, giving you clear, instant feedback through a bright LED display. Whether you are working on DIY electronics or maintaining power systems, this compact board helps you keep track of your battery status at a glance.

This LED display board is designed for accuracy and ease of use. It shows both voltage and remaining capacity, so you always know how much power is left. The built-in low voltage alarm alerts you when the battery drops below a safe level, helping you prevent over-discharge and extend battery life. You can customize the high and low voltage thresholds to match your specific battery type and needs.

The board features a user-friendly interface with a single button for control. A short press turns the display on or off, while a long press lets you enter the settings menu. It also includes a power-off memory function that saves your settings even when the power is disconnected. The adjustable backlight lets you set the display duration to suit your environment and save energy.

Compact and thumb-sized, this indicator board fits easily into tight spaces and portable setups. It supports ternary lithium, lithium iron, and lead-acid batteries across a wide voltage range, making it a versatile tool for hobbyists, technicians, and anyone who works with rechargeable batteries.

Key Features and Benefits

- Universal battery compatibility that works with ternary lithium (3S-12S), lithium iron (3S-14S), and lead-acid batteries (12V/24V/36V/48V) for flexible use across different power systems

• Real-time LED voltage and capacity display that gives you instant, clear readings of your battery status at a glance

• Customizable high and low voltage alarm thresholds that let you set safe operating limits to protect your batteries from overcharging or deep discharge

• Power-off memory function that saves your settings automatically, so you do not have to reconfigure the board after a power loss

• Adjustable backlight duration that you can set to match ambient light conditions and extend the overall service life of the indicator

• Compact and portable thumb-sized design that fits easily into tight spaces and DIY electrical projects without adding bulk

Who Is This For

- DIY electronics enthusiasts building or maintaining battery-powered projects

• Hobbyists working with RC vehicles, drones, or other battery-operated models

• Technicians and engineers monitoring battery banks in solar or backup power systems

• Anyone who needs a simple, reliable way to check battery voltage and capacity on lead-acid or lithium batteries

Usage Scenario

Tom was building a portable power station for camping trips. He needed a way to check the battery level without carrying extra equipment. After installing this LED indicator board, he could see the remaining capacity and voltage instantly. When the battery dropped too low, the alarm reminded him to recharge before the cells were damaged. The compact size let him mount it right on the front panel, keeping everything clean and functional.

Micro Comparison

Unlike basic voltmeters that only show voltage, this board displays both voltage and estimated battery capacity in one glance. It also includes a programmable low voltage alarm and backlight control, features often missing from simpler indicators. The wide input range and support for multiple battery chemistries make it a more versatile choice for users who work with different power systems.

Specifications

- Voltage measurement range: DC 7-55V (red display: DC 7-40V)

• Battery support: Ternary lithium 3S-12S, lithium iron 3S-14S, lead-acid 12V/24V/36V/48V

• Display colors: Green, Blue, Red, White

• Backlight setting: Adjustable duration

• Power-off memory: Yes

• DIY supplies category: Electrical

Package Includes

- Battery Indicator Board x 1