4S Lithium Battery Capacity Indicator Board – LED Display Module for Li-ion / Li-po Voltage Levels

Keep track of your battery levels in real-time with our compact and user-friendly Lithium Battery Capacity Indicator Board. This module provides a clear LED visual representation of battery levels for 1S to 4S Li-ion / Li-po cells. Ideal for both single and multi-cell battery packs, this module allows you to quickly evaluate the remaining charge at a glance.

Key Features

• Wide Compatibility: Supports 1S, 2S, 3S, 4S lithium batteries (Li-ion / Li-po)
• LED Display: Features 1 red and 4 blue (or green) LEDs for clear charge level indication
• Multi-Voltage Support: Compatible with 12V, 24V, 36V, and 48V lead-acid batteries or lithium iron phosphate setups
• Real-Time Voltage Indication: LED lights illuminate based on battery voltage thresholds
• Accuracy: Voltage detection with an error margin of approximately 2%
• Plug & Play: Simple two-wire connection; no programming required

Voltage Display Logic

The LED lights respond to voltage ranges for each supported cell (N) as follows:

• 1st LED (Red): Always on for power indication
• 2nd LED: Illuminates when voltage > N × 3.3V
• 3rd LED: Illuminates when voltage > N × 3.5V
• 4th LED: Illuminates when voltage > N × 3.7V
• 5th LED: Illuminates when voltage > N × 3.9V

Lead-Acid & LiFePO4 Battery Compatibility

• 12V Batteries: LEDs activate at >11.0V, >11.3V, >11.6V, >12.9V
• 24V Batteries: LEDs activate at >22.5V, >24.0V, >25.2V, >26.4V
• 36V Batteries: LEDs activate at >33.5V, >35.2V, >37.0V, >38.7V
• 48V Batteries: LEDs activate at >44.8V, >47.0V, >49.0V, >52.0V

Applications

• Battery-powered projects & DIY electronics
• Electric bikes, scooters, and RC models
• Portable power banks and solar storage systems
• Robotics and embedded systems

Note: This product is designed for general voltage indication purposes and has a ~2% tolerance range. It is not recommended for precision battery diagnostics.