3.7-4.2V Metering Module 2S Lithium Battery Power Display Module

3.7-4.2V Metering Module 2S Lithium Battery Power Display ModuleThis compact 3.7-4.2V Metering Module 2S Lithium Battery Power Display Module is engineered to provide a clear, real-time visual indication of remaining battery capacity for lithium-ion power packs. Furthermore, it utilizes an onboard precision voltage detection circuit, consequently illuminating an array of segment LEDs to reflect the state of charge accurately. Therefore, it is an essential accessory for DIY power banks, portable instruments, and custom battery-powered enclosures. However, users must verify their battery pack’s configuration (such as 1S vs 2S voltage thresholds) before connecting to ensure proper display scaling. Specifically, the purple PCB features a miniature surface-mount layout that integrates effortlessly into small device panels. Moreover, the low operating current ensures the indicator itself drains minimal power from the main energy source. Ultimately, this display module offers a simple yet professional way to prevent unexpected power depletion in mobile electronics.

Key Features

• Real-Time Capacity Display: Utilizes multi-segment LEDs to clearly show current battery level percentages at a glance.
• Optimized for Lithium Packs: Calibrated specifically to match the discharge curves of standard lithium-ion or lithium-polymer cells.
• Low Power Consumption: Draws minimal static current, consequently preserving overall battery longevity.
• Compact Form Factor: Features a tiny, lightweight footprint designed for easy embedding behind instrument panels or project enclosures.
• Simple Two-Wire Hookup: Connects directly across the positive and negative power rails for immediate operation.
• Clear Visual Feedback: Bright surface-mount LEDs remain visible even in various lighting conditions.

Technical Specifications

• Operating Voltage Range: Matches standard lithium battery voltage tiers (e.g., specific cell configurations from 3.7V nominal up to fully charged states).
• Display Type: Multi-segment LED bar graph indicator.
• Measurement Accuracy: ± 1% under normal operating conditions.
• Operating Temperature Range: −10°C to +65°C.
• Refresh Rate: Continuous real-time voltage monitoring.

Mechanical Specifications

• PCB Substrate: Premium purple FR4 fiberglass board.
• Component Layout: Surface Mount Technology (SMT) with integrated driver IC and resistors.
• Mounting Pads: Large gold-plated through-hole connection pads for secure wire soldering.

Dimensions

• Board Length: ≈ 27.0 mm.
• Board Width: ≈ 13.0 mm.
• Thickness: ≈ 4.0 mm.

Pinout and Wiring

• Positive Pad (labeled or denoted near top): Connect to the positive terminal of the battery pack.
• Negative Pad (GND): Connect to the common ground or negative terminal of the battery pack.
• Wiring Note: Double-check polarity before applying power to prevent permanent damage to the onboard voltage-sensing IC.

Datasheet Reference: Download Datasheet

• • Precision Voltage Reference and Monitoring Principles

Commonly Used in

• DIY Power Bank Enclosures
• Portable Audio Amplifiers
• Handheld Electronic Test Equipment
• Custom RC Vehicle Battery Monitors
• Solar-Powered Field Generators

Applications

• Makers integrate this display into custom battery cases to monitor remaining energy visually.
• It serves as an indicator panel for portable scientific instruments operating on lithium cells.
• Consequently, it prevents unexpected shutdowns in field-deployed IoT sensor nodes.
• Furthermore, hobbyists attach it to DIY Bluetooth speakers to show charge status clearly.
• Ultimately, it provides an inexpensive yet effective diagnostic gauge for any lithium-powered creation.

Equivalent Models

• Digital OLED Battery Voltage Meter: A numeric display alternative showing exact voltage instead of LED bars.
• 3-LED Lithium Battery Indicator Board: A simpler, lower-resolution capacity display module.
• RC LiPo Battery Checker: A plug-in handheld testing unit for similar voltage ranges.

Package Includes

• 1 x 3.7-4.2V Metering Module Lithium Battery Power Display Board