Apple mobile phone just consumes a lot of power. Usually about two years. It's almost time to consider changing the battery. Apple's mobile phone battery life is above 80%. If it is lower than 80%, consider replacing the battery.
Battery refers to a part of the space of a cup, can or other container or composite container containing electrolyte solution and metal electrodes that generate current, and a device that can convert chemical energy into electrical energy. Divided into positive electrode and negative electrode. With the development of science and technology, batteries generally refer to small devices that can generate electricity. Such as solar cells. The performance parameters of the battery mainly include electromotive force, capacity, specific energy and resistance. Using the battery as energy source, we can get a current with stable voltage, stable current, stable power supply for a long time and little external influence. Moreover, the battery has simple structure, convenient carrying, simple charging and discharging operation, stable and reliable performance, and plays a huge role in all aspects of modern social life.