DC 7-55V Battery Charge Indicator LED Display Board with Alarm

Monitor Your Battery Level at a Glance

Never get caught off guard by a dead battery again. The DC 7-55V Universal Battery Charge Indicator Board gives you a clear, real-time LED display of your battery's charge level — compatible with both acid (lead-acid) and lithium batteries. Whether you're powering a solar setup, electric vehicle, RV, e-bike, or DIY electronics project, this compact board delivers instant voltage readings with a built-in low-charge alarm to warn you before power runs out.

With a wide input range of 7V to 55V and ultra-low 20mA current draw, this indicator is ideal for hobbyists, engineers, and makers who need reliable, always-on battery monitoring without draining their power source.

Key Features

• Wide Voltage Range: Works with 7V–55V DC systems — compatible with 12V, 24V, 36V, 48V batteries and more
• Universal Compatibility: Supports lead-acid (acid) and lithium battery chemistries
• LED Bar Display: Clear, easy-to-read multi-segment LED indicator shows charge level at a glance
• Built-in Alarm: Audible/visual low-battery alert helps prevent over-discharge and battery damage
• Low Power Consumption: Only 20mA draw — won't significantly impact your battery life
• Compact PCB Design: Easy to integrate into DIY projects, enclosures, or existing battery systems
• No Battery Included: Connect directly to your existing battery bank or power system

Specifications

Perfect For

• Solar power systems & off-grid setups
• Electric bikes, scooters & golf carts
• RVs, boats & marine applications
• DIY electronics & maker projects
• UPS systems & backup power banks
• Automotive & motorcycle batteries

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Safety & Standards

For guidance on safe handling of batteries and electrical components in DIY projects, refer to the U.S. Consumer Product Safety Commission (CPSC) Battery Safety Guidelines. Always follow local electrical safety codes when integrating this board into your system.

Learn more: LED display

Frequently Asked Questions

Q: What battery types does this DC 7-55V charge indicator board support?

A: This universal battery charge indicator board supports both lead-acid (acid) and lithium battery chemistries, making it versatile for a wide range of applications including solar, automotive, RV, and DIY electronics projects.

Q: What voltage range is this LED battery indicator compatible with?

A: The board operates over a wide DC 7V to 55V input range, covering common battery systems such as 12V, 24V, 36V, and 48V. This makes it suitable for everything from car batteries to large lithium packs used in e-bikes and solar storage.

Q: How does the low battery alarm work?

A: The built-in alarm triggers when the battery voltage drops to a predefined low level, providing an alert so you can recharge or switch power sources before the battery is over-discharged — which can damage battery cells and reduce overall lifespan.

Q: How much power does this indicator board consume?

A: The indicator draws approximately 20mA of current, which is very low — making it suitable for always-on battery monitoring without significantly impacting your total battery capacity or runtime.