This Small Business Innovative Research program will develop new quality control instrumentation for US DoD 6T Li-ion battery packs. The US DoD has been developing 6T Li-ion batteries as alternatives to existing the starting, lighting, and ignition lead acid batteries used on weapon systems and transport vehicles. The proposed quality control instruments will provide new means to improve individual cell selection, BMS control algorithms, and end-of-line pack qualification. A key benefit of the proposed approach is its ability to rapidly identify manufacturing defects while providing performance metrics for the individual cells that improve pack quality. The new QC tools will be open architecture to easily integrate with exiting QC protocols available at the Li-ion battery manufacturers.