What is the operating time of a portable once fully charged?
A new 2100 mAh Ni-MH battery that is properly conditioned before the first use will supply an average of 9.5 hours of operating time based on a 90/5/5 duty cycle. The duty cycle refers to 90% idle, 5% transmit, and 5% receive. Factors that can influence the actual time are age of the battery, actual transmit and receive times during use, and if the portable is operating in faded coverage that causes the portable to search for usable radio site signal. OpenSky portables constantly sample the radio network for available signal that is usable and if in faded environment the radio will search more frequently than when in good coverage. This sampling involves transmitting and receiving independent of the user’s normal portable functions. The user can see this function if they observe the LED and notice the blinking red and green indicators when not actually engaging the portable push to talk (PTT) button or when receiving voice messages.
