12V 4S 20A LiFePO4 BMS with Balance Overcharge, Over-Discharge, Short-Circuit & Overcurrent Protection

Worried about battery failures ruining your project? The amiciKart 12V 4S 20A LiFePO4 BMS is your all-in-one protection solution — engineered to keep your 12.8V LiFePO4 battery pack safe, balanced, and running at peak performance for years.

This Battery Management System is purpose-built for 4-cell (4S) LiFePO4 configurations, delivering up to 18–20A of reliable charge and discharge current. What sets it apart is the built-in 50mA passive cell balancing that continuously equalises all four cells — preventing capacity drift and extending your overall pack life significantly. Whether you're building a DIY solar storage system, powering an e-bike, running power tools, or assembling a custom backup battery, this BMS handles the heavy lifting so you don't have to babysit your battery.

Safety is baked in at every level: millisecond-response protection against overcharge, over-discharge, short circuit, and overcurrent keeps your cells and connected devices safe under any fault condition. Thermal protection automatically shuts the system down at 65°C and resumes operation at 45°C — no manual intervention needed. The auto-recovery feature means the BMS resets itself after a fault clears, making it a true set-and-forget solution for both hobbyists and professionals.

Backed by a 1-year warranty from amiciKart with dedicated customer support, this BMS ships free across India with same-day dispatch on orders placed before 2 PM. Only a few units left in stock — order now to avoid delays on your build.

• Protect your battery pack completely — guards against overcharge, over-discharge, short circuit & overcurrent with millisecond-level response (4-in-1 protection, rated for 18–20A charge/discharge)
• Extend battery life with built-in cell balancing — 50mA passive balancing keeps all 4 LiFePO4 cells equal, preventing capacity drift and improving long-term pack stability
• Thermal safety built in — automatically shuts down at 65°C and self-resumes at 45°C, keeping your pack safe during heavy loads or warm environments
• Zero-hassle auto-recovery — restarts automatically after any fault condition, no manual reset needed, ideal for unattended solar and backup power setups
• Designed for 12.8V (4S) LiFePO4 packs — precise voltage matching ensures compatibility with e-bikes, solar storage, DIY battery packs, and power tools
• Shop with confidence — 1-year warranty backed by amiciKart, 30-day no-questions-asked returns, COD available, and free shipping pan-India with same-day dispatch on orders before 2 PM