Lithium-ion batteries play a vital role in the rapidly expanding electric vehicle market. However, the challenges associated with battery use, reuse, and disposal remain significant. The BAT-MAN 2nd Life project aims to extend BAT-MAN, a device designed by Brain Technologies for diagnosing lead-acid batteries, to characterize lithium-ion batteries. State of Health (SoH) and State of Charge (SoC) are crucial metrics used to evaluate the battery's behavior for its future life and can be obtained by employing specific algorithms. This thesis aims to prototype a device for acquiring the electrical parameters needed to characterize lithium-ion cells. The system was designed to validate the theoretical algorithms and serve as a starting point for an application-specific device capable of autonomously managing battery diagnosis and characterization.