BMS 3S 40A 12.6V Li-ion Lithium Battery Protection & Charging Board – For 18650/26650/Polymer Batteries

Protect and manage your lithium batteries with the 3S 12.6V 40A BMS Protection Board. Designed for 18650, 26650, and polymer lithium batteries, this board ensures safe charging, balanced discharging, and extends battery life. Ideal for DIY electronics, drills, and high-power devices, it supports up to 40A continuous discharge and 20A charging current, while keeping your batteries safe from overcharge, over-discharge, and short circuits.

💡 Enhanced safety features include precise voltage balancing and thermal protection. Perfect for applications requiring high current and stable performance.

Specifications:

• Product Name: 3S 12.6V 40A Lithium Battery Protection Board
• Charging Voltage: DC 12.6V ~ 13.6V
• Continuous Discharge Current: Max 40A (reduce load if heat dissipation is poor)
• Continuous Charging Current: Up to 20A
• Balance Version Size: 41 × 61 × 4 mm
• Enhanced Version Size: 41 × 55 × 4 mm
• Applicable Battery: Nominal 3.7V, fully charged 4.2V lithium batteries (18650, 26650, polymer)
• Maximum Drill Power Supported: ≤ 170W
• Recommended Power Batteries: 3 × 10C–20C or 6 × 5C–10C (e.g., Sony VTC4, VTC4A, VTC5A, VTC6)
• Wiring Requirement: ≥ 3 mm² copper wire (Nickel sheets cannot be used)