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

Single-Cell (1S) 3.7V Lithium Protection: Designed for single-cell (1S) 3.7V lithium-ion, polymer, or 18650 battery cells with a peak charging cut-off of 4.2V.

Spot-Weld & Solder-Friendly Bonding Pads: Features reinforced metal bonding pads specifically engineered for direct spot welding or soldering onto battery tabs and leads.

3A Overcurrent Protection Limit: Configured with a 3A overcurrent protection threshold, automatically tripping output during excessive current draws or load surges.

Automated Safety Cutoffs: Built-in hardware protection against overcharging, over-discharging, overcurrent, and short circuits to safeguard battery cell life.

Ultra-Compact Strip Form Factor: Slim PCB profile minimizes pack size, making it ideal for integration into slim polymer battery pouches and single 18650 cell sleeves.

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

Technical Specifications:

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

Overcurrent Limit: 3A.

Attachment Type: Solder / Spot-weld bonding pads.

Board Color: Blue PCB.

Usage Advice: Ensure clean contact points before spot welding nickel strip or soldering leads directly onto the board pads (B+, B-, P+, P-).

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

Essential Single-Cell DIY Protection: Position as an indispensable safety board 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 repair technicians to spot weld nickel tabs directly, ensuring low-resistance contacts without risking heat damage to components.

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 board.