Panasonic DuraMax

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Capacity - The bigger, the better! However, battery capacity is not the only factor that has an effect on battery life. Those include the chipset in use, the software running on the device, as well as the consumer's unique usage pattern.

AMPS - Advanced mobile phone standard. Analogue standard used widely in North America.

TDMA - Time Division Multiple Access. A multiplexing technology used with satellites and cellular phones, in which multiple channels of data are interleaved (each signal is assigned to a different time interval, and the signals are transmitted by taking turns). . For cellular, TDMA triples the capacity of the original analog method. The GSM cellular system is also based on TDMA, but GSM defines the entire network, not just the air interface.

FCC approval - The Federal Communications Commission (FCC) is an independent United States government agency, directly responsible to Congress. The FCC was established by the Communications Act of 1934 and is charged with regulating interstate and international communications by radio, television, wire, satellite and cable. The FCC's jurisdiction covers the 50 states, the District of Columbia, and U.S. possessions. Every wireless phone device that is sold in the U.S. has to be tested and approved for sale by the FCC.