1S 3.7V Li-ion 1MOS 4.5A Battery Protection Board

Single-Cell (1S) Lithium Protection: Tailored for single-cell (1S) 3.7V nominal and 4.2V max charging voltage lithium-ion, LiPo, and 18650 battery cells.

4.5A Continuous Discharge Rating: Built with an upgraded single power MOSFET (1MOS) circuit capable of supporting up to 4.5A continuous discharge current for medium DC loads.

Compact Strip Form Factor: Ultra-slim PCB profile allows easy integration inside tight battery shrink wraps, polymer pouch cell tabs, and small project housings.

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

Solder-Friendly Connection Terminals: Clearly marked solder pads (B+, B-, P+, P-) simplify direct wiring to battery nodes and power output cables.

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

Technical Specifications:

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

MOSFET Count: 1MOS.

Continuous Discharge Current: Up to 4.5A.

Board Color: Green PCB.

Usage Advice: Ensure correct polarity when soldering battery terminals (B+ and B-) before attaching the load/charger leads (P+ and P-).

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

Essential Single-Cell Safeguard: Position as an ideal safety module for single 18650 cells or lithium pouch batteries used in IoT gateways, high-power flashlights, microcontrollers, and custom handheld electronics.

Highlight Higher Current Capacity: Emphasize how the 4.5A current limit provides extra headroom over standard 2A or 3A protection boards, preventing nuisance trips during motor startup surges or heavy LED loads.

Recommended Cross-Sell Add-ons: Pair with 1S 3.7V Li-ion 1MOS 3A Battery Protection Board, 1S 3.7V Li-ion 1MOS 6A 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 mid-range 1S 4.5A protection board.