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4 Series 40A 18650 Lithium Battery Protection Board – 14.8V to 16.8V BMS with Balance for Drill Motor, Lipo Cell Module
The 4 Series 40A 18650 Lithium Battery Protection Board with balance is engineered to safeguard and manage lithium battery packs rated at 14.8V to 16.8V. It is compatible with popular cell types including 18650, 26650, and polymer lithium batteries, making it highly versatile for DIY and professional applications.
This 4 Series 40A 18650 Lithium Battery Protection Board supports a maximum charging current of 20A and continuous discharge up to 40A. It comes with balancing functionality, ensuring equal charging across all cells. Equipped with 10 low-resistance MOSFETs, it provides fast response, reduced heat generation, and a self-recovery function for added safety.
🔧 Key Features
- Supports 4-cell (4S) lithium battery packs
- Built-in cell balancing for improved efficiency
- Continuous discharge rating up to 40A
- Compact and lightweight module for easy integration
- Self-recovery protection circuit with MOSFET design
- Suitable for high-drain tools and electronics
📐 Technical Specifications
| Product Name | 4 Series 40A 18650 Lithium Battery Protection Board with Balance |
| Supported Cells | 4S Lithium (18650 / 26650 / Polymer) |
| Nominal Voltage | 14.8V – 16.8V |
| Charge Voltage Range | 16.8V – 18.1V |
| Charge Current | Up to 20A continuous |
| Discharge Current | 40A continuous (reduced in poor cooling) |
| Balance Current | 100mA |
| Overcharge Detection | 4.25V ± 0.025V per cell |
| Over-discharge Detection | 2.50V ± 0.08V per cell |
| Protection Features | Overcharge, Over-discharge, Overcurrent, Short-circuit |
| Operating Temperature | -40°C to +85°C |
| Dimensions | 60 × 45 × 3.5 mm |
| Weight | ~12 g |
📌 Applications
- Electric drill and handheld power tools
- LED lighting systems
- Portable sprayers and pumps
- Small inverters below 135W
- Custom lithium battery packs
💡 Why Choose This Product?
This battery module provides excellent safety features, high current handling, and balance charging. The 4 Series 40A 18650 Lithium Battery Protection Board is the perfect choice for anyone building lithium-powered tools or devices needing reliable battery management.
📦 Package Includes
- 1 × 4 Series 40A 18650 Lithium Battery Protection Board with Balance
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