3S 2A 18650 LiPo Li ion Battery Charger Module 4.2V 8.4V 12.6V Voltage Step Down Boost Board

3S 2A 18650 LiPo Li ion Battery Charger Module 4.2V 8.4V 12.6V Voltage Step Down Boost Board delivers a reliable and efficient power management solution for three-series lithium battery packs. This versatile module manages multi-cell charging cycles while maintaining strict voltage thresholds for optimal safety. Consequently, it prevents overcharging and extends the overall operational lifespan of connected 18650 cells. Furthermore, the compact circuitry handles high charging currents effectively without excessive thermal buildup. Therefore, engineers and DIY hobbyists can integrate this hardware seamlessly into portable power banks and custom battery packs.

Key Features:

• 3S Cell Support: Specifically engineered to manage and charge three-series 18650 lithium-ion or LiPo battery packs.
• Precise Voltage Regulation: Targets a fully charged 3S pack voltage of 12.6V with high accuracy.
• Integrated Protection: Safeguards cells against overvoltage, undervoltage, and short-circuit conditions during operation.
• High Current Capacity: Delivers up to 2A charging performance to replenish energy stores quickly.
• Compact Layout: Features a streamlined board profile designed for tight electronic enclosures.

Technical Specifications:

• Supported Battery Type: 3S Lithium-Ion / LiPo (18650 cells)
• Target Full Voltage: 12.6 VDC
• Maximum Charging Current: 2.0 A
• Input Voltage Range: DC 3.0V to 18.0V (depending on board configuration mode)
• Switching Frequency: High-frequency PWM for enhanced power conversion efficiency

Mechanical Specifications:

• Board Material: High-grade FR4 double-sided printed circuit board
• Terminal Type: Through-hole solder pads for secure wire attachment
• Mounting Style: Panel or chassis integration via soldered wiring leads
• Thermal Performance: Low thermal resistance layout for stable heat dissipation

Dimensions:

• Board Length: ≈ 38.0 mm
• Board Width: ≈ 15.0 mm
• Board Height: ≈ 4.0 mm
• Weight: ≈ 4.0 g

Pinout and Wiring:

• VIN: Power supply input terminal for connecting external DC voltage sources.
• GND: Common ground connection for input power and system reference.
• BAT+: Positive terminal linking to the combined 3S battery pack positive node (12.6V).
• BAT-: Negative terminal linking to the 3S battery pack negative ground line.
• B1: Intermediate tap point between the first and second cell in the 3S series string.
• B2: Intermediate tap point between the second and third cell in the 3S series string.
• Note: However, always verify correct cell wiring polarity before applying input power to avoid catastrophic circuit failure.

Datasheet Reference:

• Download Battery Management Controller Datasheet Reference

Commonly Used in:

• Portable Power Banks: Building custom high-capacity rechargeable power storage units.
• DIY Instrumentation: Supplying regulated power to field test equipment and multimeters.
• Robotics Power Packs: Managing multi-cell battery arrays for mobile robotic platforms.

Applications:

• Backup Power Supplies: Creating uninterrupted power sources for small embedded systems.
• Solar Charging Systems: Regulating energy harvest from small solar panels into 3S lithium packs.
• Handheld Electronics: Powering portable LED lighting rigs and wireless transmission gear.

Equivalent Models:

• 3S 40A BMS Protection Board: A high-current alternative focused purely on discharge protection rather than active step-down charging.
• 2S Li-Ion Charger Board: A lower voltage variant tailored specifically for two-series battery configurations.
• TP5100 Lithium Battery Charger Module: A versatile single or dual-cell charging solution with adjustable current settings.

Package Includes:

• 1 × 3S 2A 18650 LiPo Li ion Battery Charger Module 4.2V 8.4V 12.6V Voltage Step Down Boost Board