I'm sure you've noticed that you see a notable difference in how well a phone battery holds a charge after a year or so. If you keep a phone long enough, its battery may not even have enough charge to survive a whole day. Have you ever wondered why?
The answer is both simple and not so simple. But to fully understand why your phone's battery won't always last as long as it did when you first bought it, you first have to understand how batteries work. We'll try to break it down as simply as possible.
