5S 15A Li-ion Lithium Battery BMS 18650 Charger Protection Board 18.5V 21V Cell

5-Series (5S) Lithium Protection: Specifically designed for 5-cell 18650 lithium-ion / LiPo battery pack configurations operating at nominal 18.5V and max 21V charging voltage.

15A Continuous Discharge Current: Delivers up to 15A continuous discharge current with reliable thermal management, ideal for medium-power DC applications, power tools, and robotics.

Automated Safety Protection: Integrated protection control IC provides instant hardware-level cutoffs against overcharging, over-discharging, overcurrent, and short circuits to ensure safe cell operation.

Included Balance Cable Harness: Comes with a pre-wired multi-pin balance plug harness for clean, effortless connection to each individual cell node across the 5S battery stack.

Compact PCB Layout: High-density board design equipped with heavy-duty power MOSFETs and clearly labeled terminals (B-, B+, P-, P+) for straightforward wiring.

Board Material: High-grade FR-4 glass-reinforced epoxy PCB equipped with surface-mount power MOSFETs and balance connector socket.

Technical Specifications:

Series Configuration: 5S (5 Cells in series).

Nominal / Max Voltage: 18.5V nominal / 21V max charge voltage.

Continuous Discharge Current: Up to 15A.

Board Color: Green PCB.

Usage Advice: Connect the included balance cable harness to each cell junction in sequence starting from B- up to B+ before plugging it into the BMS socket.

Maintenance: Keep board clean, dry, and stored in anti-static packaging when not in use to avoid static damage.

Essential 18.5V / 21V Power Solution: Position as the ideal protection board for upgrading or constructing 5S 18650 battery packs used in power tools, lawn trimmers, electric scooters, and solar storage units.

Highlight Plug-and-Play Wiring: Emphasize how the included wiring harness simplifies assembly, making it easy to wire cell balance taps safely without soldering directly to delicate board pins.

Recommended Cross-Sell Add-ons: Pair with 18650 BMS Board 6S 15A Balanced 24V, 18650 BMS Board 4S 40A Balanced 16.8V, 4S 30A 14.8V LI-ION Lithium 18650 Battery, and ESD antistatic mat 50x40CM PCB Welding Mat.

Featured Collection Star: Display prominently on your Hardware Battery Management System collection page as your standard 5S 15A protection board.