4S 18650 12V Lithium Battery Capacity Indicator Module – Percent Power Display Tester

The 4S 18650 12V Lithium Battery Capacity Indicator Module is a compact and reliable solution for visually monitoring the charge level of lithium battery packs. Designed to work with 4S 18650 lithium-ion batteries (nominal 12V), this module detects the real-time voltage and displays the corresponding charge percentage using onboard LEDs.

Whether you’re building a DIY battery pack, testing power levels for mobile or embedded systems, or maintaining energy systems, this power tester ensures clear battery status visibility. It supports both single lithium cells and multi-parallel series packs, making it a versatile addition to any battery-powered setup.

🔧 Key Features

• Designed for 4S 18650 lithium battery packs (12V nominal)
• Displays battery level using multiple LED segments
• Supports both single-cell and multi-parallel configurations
• Auto-voltage detection and percent power visualization
• Simple 2-wire connection: Positive and Ground
• Compact module form for easy integration
• Pre-calibrated for accurate charge status indication

📐 Technical Specifications

📌 Applications

• 4S lithium battery power banks
• Portable solar or energy storage units
• DIY battery packs and BMS monitoring
• RC vehicles and robotics
• Embedded and mobile power systems

💡 Why Choose This Indicator Module?

The 4S 18650 Battery Capacity Indicator provides an immediate, visual representation of battery status without any complex wiring or programming. It’s the perfect diagnostic and display tool for anyone working with lithium battery packs in DIY or embedded electronics projects.

📦 Package Includes

• 1 × 4S 18650 12V Lithium Battery Capacity Indicator Module