Smartphones these days have a special place among people around the world, and you see almost no one who does not use smartphones. At the moment, the smartphone has replaced many of the devices needed by people, including the camera, notepad, clock, book, even a computer, etc. It has become an all-in-one tool. The same thing makes the user want to use his phone for hours. That's why the battery life of the phone is one of the most important factors when purchasing the phone.