Lithium 'coin' batteries, such as the CR2032 from BeStar Technologies, are the primary energy source in watches, small lights, calculators, garage door openers, car key fobs, pedometers and many more small electronic devices. Small batteries vary widely, with differing form. As a result, small energy storage products have emerged as technological marvels that encapsulate the essence of modern energy solutions. The sophistication of these devices ranges widely, with each product addressing specific needs in various sectors. A common size. Let's face it—we're all secretly terrified of our phones dying mid-vlog or losing power during a Netflix binge. This article explores the 5 types of energy storage systems with an emphasis on their definitions, benefits, drawbacks, and real-world applications.