1S 3.7V Li-Ion BMS Protection Board + Nickel Strip (10/20pcs)

1S 3.7V Li-Ion BMS Battery Protection Board with Nickel Welding Strip

Keep your lithium battery packs safe and running at peak performance with this compact 1S 3.7V Battery Management System (BMS) Protection Board. Engineered with high-precision imported components and premium MOSFETs, each board delivers reliable multi-layered protection in a space-saving 18 × 3.6 mm form factor — ideal for DIY electronics, RC projects, portable power banks, and custom battery packs.

Key Features

• 4-in-1 Protection: Overcharge, over-discharge, short circuit, and overcurrent protection in one compact board
• Premium Components: Japanese precision protection IC paired with VISHAY, AOS, and IR high-quality MOSFETs for stable, dependable performance
• FR-4 Low Temperature Coefficient PCB: Carefully designed for minimal thermal drift and long-lasting durability
• Compact Size: 18 × 3.6 mm — fits easily into tight battery pack assemblies
• Low Quiescent Current: Minimal power draw to maximise your battery runtime
• Nickel Strip Included: Each board comes with a soldering strip for fast, secure cell connection
• Flexible Quantities: Available in packs of 10, 20, 50, or 100 — perfect for prototyping or production runs

Technical Specifications

• Cell Configuration: 1S (single cell)
• Nominal Voltage: 3.7V Li-Ion
• Size: 18 × 3.6 mm (approx.)
• Overcharge Release Voltage: 4.23 ± 0.05V
• Overcharge Detection Voltage: 4.25 ± 0.05V
• Over-Discharge Detection Voltage: 2.54 ± 0.1V
• Overcurrent Detection Current: 1–3A
• Continuous Current: 2A | Peak Current: 3A
• Material: FR-4 PCB with plastic housing

Wiring / Connection Guide

• B+ → Connect to Battery Positive (+)
• B− → Connect to Battery Negative (−)
• P+ → Battery Output Positive (+)
• P− → Battery Output / Input Negative (−)

Package Contents

• Option 1: 10× Protection Boards with Nickel Soldering Strip
• Option 2: 20× Protection Boards with Nickel Soldering Strip
• Option 3: 50× Protection Boards with Nickel Soldering Strip
• Option 4: 100× Protection Boards with Nickel Soldering Strip

Made in Mainland China.

Note: Actual color may vary slightly from images due to monitor brightness and lighting conditions. Please allow minor measurement tolerances (±1–2 mm).

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For further reading on lithium battery safety standards and best practices, visit the U.S. Consumer Product Safety Commission – Battery Safety.

Learn more: Battery management system

Frequently Asked Questions

Q: What does a BMS protection board do for a 1S 3.7V Li-Ion battery?

A: A Battery Management System (BMS) protection board monitors and protects your lithium-ion cell from overcharging (above 4.25V), over-discharging (below 2.54V), short circuits, and overcurrent events. This ensures safe operation and extends the working life of your 3.7V Li-Ion battery pack.

Q: Can I use this BMS board with different lithium battery shapes and capacities?

A: Yes. This 1S BMS protection board is compatible with a variety of 3.7V Li-Ion cell shapes and capacities (cylindrical, pouch, etc.), making it suitable for power banks, RC devices, DIY portable electronics, and other single-cell lithium battery applications.

Q: Is nickel strip included and how is it used?

A: Yes — each protection board comes with a nickel soldering strip. The strip is spot-welded or soldered between the BMS board and the battery terminals to create a secure, low-resistance electrical connection without directly soldering heat-sensitive battery cells.

Q: What quantities are available for bulk or project use?

A: This listing is available in packs of 10, 20, 50, or 100 boards with nickel strips — ideal whether you're prototyping a single project or running a larger production batch.