20A 3S Balancing Protection Board

This 3S battery protection board delivers balanced cell management and multi-layer safety for custom lithium-ion pack development. With a nominal voltage of 11.1V and dual current capability (3A continuous / 20A peak), it suits both low-power diagnostics and high-load operation. Available in two physical variants: Type A (~9.50 × 1.00 cm) and Type B (~11.00 × 4.50 cm), both constructed with durable ABS material. Its open-board architecture showcases eight MOSFETs and clearly printed pad labels for error-resistant wiring. The integrated balancing circuit works alongside overcharge, overdischarge, overcurrent, and short-circuit protections to ensure safe, repeatable pack performance. Purpose-built for DIY enthusiasts, repair technicians, and portable power system integrators.