4S 20A 18650 BMS/ Battery Protection Board
The 4S 20 A 18650 BMS (Battery Management System) Battery Protection Board is a compact, yet powerful safeguard designed for four‑cell lithium‑ion battery packs (in 4-series/1-parallel configuration), delivering up to 20 amps continuous current. It features balanced charge and discharge capability, over‑voltage and under‑voltage protection, over‑current and short‑circuit defense, and temperature monitoring—all crucial for maximizing battery lifespan and ensuring safe performance. Ideal for DIY battery packs, electric mobility, portable power banks, and hobbyist electronics, this BMS board integrates seamlessly between your series-connected 18650 cells and charging/discharging circuits, offering peace of mind and reliable operation in a small, easy-to-install form factor.
- Lithium Battery Protection Board
- high-accuracy voltage detection circuit;
- Max Peak current:20A
- Over Charge Voltage:4.25-4.35v±0.05v Over Discharge Voltage: 2.3-3.0v±0.05v
- Built-in three-stage over-current detection circuit (over-current 1, over-current 2, or load short circuit)
Thank you for your order!
Your Order ID is:
Please click the "Pay Now" button below to complete your payment.