3.7V 18650 Lithium Battery Protection Board – 3A Overcurrent, Spot Welding Pad, BMS for Polymer Cells

This 3.7V 18650 Lithium Battery Protection Board is a compact and reliable Battery Management System (BMS) designed to protect single-cell lithium-ion or lithium polymer batteries. It ensures safety through overcharge, over-discharge, and overcurrent protection, supporting a continuous discharge current of up to 3A. The board is ideal for use in DIY battery packs, power banks, LED lights, and portable electronics requiring dependable power and safety features.

Key Features

• Designed for 3.7V 18650 lithium-ion or Li-Po cells

• Integrated BMS with 3A discharge overcurrent protection

• Overcharge and over-discharge voltage cut-off protection

• Spot welding pad for stable and secure battery connections

• Compact and lightweight for easy integration in small devices

Technical Details

• Product Name: 3.7V 18650 Lithium Battery Protection Board

• Compatible Battery Type: 3.7V 18650 lithium-ion / Li-Po cell

• Number of Cells Supported: 1S (single cell)

• Overcharge Protection Voltage: 4.25 ± 0.05V

• Over-discharge Protection Voltage: 2.5 ± 0.1V

• Overcurrent Protection: 3A

• Continuous Discharge Current: Up to 2A (recommended)

• Short Circuit Protection: Yes (auto recovery)

• Self-Consumption Current: ≤5µA

• Connection Type: Spot welding pad

• PCB Dimensions: L30*W3.5*T1.7 mm

• Weight: Approx. 1g

• Operating Temperature Range: -40°C to +85°C

• RoHS Compliant: Yes

Applications

• DIY 3.7V 18650 Lithium Battery packs

• Portable electronic projects and wearables

• Power banks and rechargeable devices

• LED lights, Bluetooth speakers, and RC models

• Embedded systems and battery-powered sensors

Why Choose the 3.7V 18650 Lithium Battery Protection Board?

This 3.7V 18650 Lithium Battery Protection Board is engineered for safe and efficient battery operation. It prevents overcharging and over-discharging, ensuring long battery life and stable power delivery. With a compact design and spot welding compatibility, it’s perfect for DIY enthusiasts, engineers, and makers building custom battery-powered solutions.

Package Includes

• 1 x 3.7V 18650 Lithium Battery Protection Board (1S BMS)