Mobile phone batteries are energy storage tools that provide power to mobile phones. They are composed of three parts: battery cells, protection circuits, and casing. Mobile phone batteries generally use lithium batteries and nickel-metal hydride batteries. MAh on the battery represents the unit of battery capacity, the larger the number, the greater the capacity.
Mobile phone batteries are similar to all rechargeable batteries and are consumable parts. The longer the use time, the lower the energy efficiency.