From the phone in your pocket to the car on your driveway, batteries quietly power modern life. But how do these tiny boxes of chemistry actually work? In this episode we crack open the science of batteries — from the basics of anodes, cathodes, and electrolytes, to the differences between lithium-ion, alkaline, and lead–acid cells. We explore why voltage and current matter, how thousands of cells are scaled up to run electric cars, and what really happens when batteries fail or catch fire. We also dig into why they wear out over time, the challenge of long-term storage, and the big question: can energy storage keep up with our growing global demand? Batteries aren’t just about powering gadgets — they may shape the entire future of energy.