This whitepaper highlights the importance of energy-efficient devices and their impact on battery life in mobile devices and large-scale industrial installations. It emphasizes the shift from linear regulators to modern switch mode power supplies, driven by advancements in processor voltages and switching frequencies. It highlights the role of new materials like the WE-MAPI series in reducing losses in power inductors and introduces REDEXPERT as a tool for accurate data analysis in power inductor design.