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The phone will be power down two minutes after generating a Low battery Alarm.
Battery charging is controlled by the CPU within the phone. If external power is detected and the temperature is within
specified limits, the charger starts the rapid charge algorithm.
When the battery is fitted, the charging algorithm is determined by constant voltage and constant current control with
time, temperature and voltage safeguards. A current limit not greater than the maximum charge current for any battery
option must be provided by the external power source.
5.16.2. Deeply Discharged Batteries
In the case of deeply discharged batteries, there may not be enough power in the battery to initiate charging. In this case,
the charging circuit automatically starts to trickle charge the battery until there is enough power to switch on the phone.
5.17. Accessory Control
The telephone can detect accessories connected to the I/O connector by pulsing ACC_PWR high and checking
ACC_ID. It can then communicate with the detected peripheral and control set ACC_PWR where required, as detailed in
the following table.
Input
Output
Peripherals
ACC_ID
ACC_PWR
High
Data cable
High
Digital Camera
ACC_ID
ACC_ID
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