computer hardware, consumer electronics, electronic components  

Mobile phone battery, cell phone battery

Rechargeable batteries are utilized extensively in powering a variety of portable electronic devices. One such device is the cell phone where the battery functions to provide power to the various circuitry therein. The use of mobile phones has become more and more popular recently for the provision of fast and convenient communication. The power source of the mobile phone generally comes from a rechargeable battery. The cellular phone requires a battery pack which is easily detachable from the cellular phone for charging when the battery pack's power is exhausted. Typically, such phones employ NiMH batteries, Li-ion batteries, or Li-polymer batteries, as power supplies. When a battery runs out of electricity, the rechargeable battery is often removed from the housing of the mobile phone so that the battery can be recharged or replaced. Lithium ion secondary batteries are small and lightweight, and are hence used widely in laptop computers, cellular phones and many other electronic appliances, and the demand is increasing. This is because the weight energy density of the lithium ion secondary battery is higher than in the nickel-cadmium secondary battery (NiCd) and nickel mercury secondary battery (NiMH). A lithium ion battery is characterized by its anode and cathode active materials made of a substance capable of occluding and releasing lithium ions. a battery charger for a cellular phone charges a battery through a connection terminal at the rear of the battery in a state that the battery is only inserted into the battery charger or the cellular phone having the battery is inserted into the battery charger. Cellular phone battery packs include a memory device in addition to the battery cells to store important information about the battery in which it is embedded. For example, the memory device can include information about the battery such as the battery type used, and specifics concerning the charging regime to be employed. Moreover, it can store "fuel gauge" information to enable the cell phone to determine accurately the state of charge of the battery such as a measurement based on measured battery voltage. In addition, many rechargeable batteries incorporate a thermistor into a rechargeable battery to monitor the temperature of the battery during the charging process. Typical battery housings for cellular phones incorporate a plastic case or enclosure for holding the battery cells and often other electrical circuitry components necessary to build-up the complete battery structure to power the phone when the battery housing is engaged with the cellular telephone.


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