3.7V Lithium Battery Protection Board for Polymer 18650 Bonding Pad (can Spot/Weld) 3A Overcurrent Value

Single-Cell (1S) 3.7V Lithium Protection: Engineered for single-cell (1S) 3.7V nominal / 4.2V max charge lithium-ion, lithium polymer, and 18650 battery cells.

Spot-Weld & Solder-Friendly Bonding Pads: Features reinforced nickel-plated bonding pads specifically designed for direct spot welding or soldering onto battery tabs and lead wires.

3A Overcurrent Protection Limit: Configured with a 3A overcurrent trip threshold, automatically disconnecting the load during power spikes or short circuits.

Automated Safety Protection: Integrated protection IC provides instant hardware-level cutoffs against overcharging, over-discharging, overcurrent, and output short circuits.

Ultra-Compact Strip Form Factor: Slim linear PCB profile minimizes overall pack footprint, making it ideal for tight polymer pouch cell enclosures and cylindrical 18650 battery assemblies.

Board Material: High-grade FR-4 glass-reinforced epoxy PCB equipped with surface-mount power MOSFETs and protection control IC.

Technical Specifications:

Series Configuration: 1S (1 Cell, 3.7V nominal / 4.2V peak).

Overcurrent Limit: 3A.

Attachment Type: Solder / Spot-weld bonding pads.

Board Color: Green PCB.

Usage Advice: Clean the terminal pads before spot welding nickel tabs or soldering wire leads directly onto the board connections (B+, B-, P+, P-).

Maintenance: Keep the module clean, dry, and stored in antistatic packaging prior to battery pack assembly.

Essential Single-Cell DIY Protection: Position as an indispensable safety component for lightweight polymer pouch cells, custom 18650 battery builds, Bluetooth headsets, and small IoT sensors.

Highlight Direct Spot-Welding Compatibility: Emphasize how the durable bonding pads allow makers and technicians to spot weld nickel tabs directly, ensuring robust, low-resistance connections.

Recommended Cross-Sell Add-ons: Pair with 1S 3.7V Li-ion 1MOS 3A Battery Protection Board, 1S 3.7V Li-ion 1MOS 2A Battery Protection Board, 1S 18650 Lithium Battery Capacity Indicator Module Level Tester LED, and ESD antistatic mat 50x40CM PCB Welding Mat.

Featured Collection Star: Display prominently on your LiFePO4 (LFP) Hardware BMS Modules collection page as your standard spot-weldable single-cell 3A protection module.