4S 100A 14.8V/16.8V Li-ion Protection Board with Equalization - 5-Pin

This 4S 100A Protection Board is a heavy-duty Battery Management System (BMS) designed specifically for 4-series Lithium-ion (Li-poly/NCM) battery packs. Supporting a massive 100A continuous discharge, it is the ideal choice for high-power electric vehicles, portable power stations, and custom DIY battery builds. The module includes an integrated equalization circuit that ensures all four cells stay balanced, maximizing both the runtime and the lifespan of the pack. With high-precision sensing for overcharge, deep discharge, and short-circuit protection, this board offers a critical safety layer for high-density 3.7V polymer cells. The included 5-pin balance harness provides a straightforward way to monitor each of the 4 channels during operation.

Key Features:

• High-Current 100A Discharge: Built for extreme performance with a thick-copper PCB and low-resistance MOSFETs.
• 4-Channel Precision Balancing: Integrated passive equalization keeps all cells at the same voltage for optimal health.
• 16.8V Peak Output: Designed for 3.7V nominal polymer cells reaching 4.2V at full charge.
• Comprehensive Protection: Automatic safeguards for over-current, short-circuit, and cell-level voltage irregularities.
• 5-Pin Balance Port: Simplified wiring with a dedicated sensing harness included for all 4 channels.

Package Includes:

1 x 4S 100A 3.7V Lithium-ion battery protection board with equalization and 5-pin cable