Battery Life i.e., Your Cell Phone

Forget about your big-huge EV car battery and the thousands of dollars to replace that when its time comes, but rather, you can see and feel it in your cell phone when your lithium-ion battery doesn't seem to take a full charge. Eventually it feels like you are constantly putting it back on the charger to get through the day, until you decide to toss it for a new cell phone (lease).

Rechargable batteries have a lifespan and it is not forever. The life of a rechargable battery is related to its chemical age. This is more than just the length of time since the battery was assembled from its raw elements. It chemical age results from a complex combination of multiple factors, such as temperature history and (probably most importantly) the charging pattern. All rechargeable batteries are consumable components that become less effective as they chemically age. As a lithium-ion battery chemically age, the amount of charge it can hold diminishes, resulting in reduced battery life and reduced peak performance.