Due to their small size, low weight, and extremely high power density, these batteries are used in numerous applications, including LED flashlights, digital cameras, laptops, power tools, medical technology, e-cigarettes, e-bike batteries, and e-mobility. Users benefit from the rechargeable nature and high energy density of these batteries, allowing devices to be used for a longer period without needing to recharge or change the batteries. With Li-Ion technology, the memory effect is eliminated, and the specified capacity essentially remains intact.