Developers guide

Chapter 6: Power Management
Battery Power Management
Psion Teklogix Mobile Devices SDK Developers Guide 37
6.1 Battery Power Management
The Mobile Devices SDK provides features that can be used to control and preserve battery power
in Psion Teklogix computers.
6.1.1 Suspend Timeout
The suspend timeout determines how long the Psion Teklogix computer will wait for any activity
(key press, scan, or touch screen event, or a wireless radio transmission) before it should go into
the suspend state. In the suspend state, the keyboard, display and all peripherals including the
wireless radio are turned off, but the operating system remains active and any applications are
maintained in their current state until the terminal resumes operation.
When the user wakes the computer — by pressing the [ENTER]/Power button — the device
returns to the normal powered state. The backlight, the display, and all peripheral devices turn on
and the suspend timer begins counting again.
The suspend timeout is configured as an integer variable measured in seconds. Any value between
0 and the maximum value of 2147483647 can be configured, however the Control Panel Power
applet only allows a small number of pre-defined values to be set. If you set the suspend timeout
using the SDK to a value not on the pre-defined list, the Control Panel Power applet will instead
display the default value for that setting.
The list of pre-defined Control Panel Power applet suspend timeouts, and their corresponding
integer values in seconds are available on Psion Teklogix computers depending on the operating
system as follows:
Windows CE 5.0 Windows Mobile
Timeout
Int
Value
Battery
Power
External
Power
Battery
Power
External
Power
Never 0 Yes Yes Yes Yes
1 min 60 Yes Yes Yes Yes
2 min 120 Yes Yes Yes Yes
3 min 180 Yes No Yes No
4 min 240 Yes No Yes No
5 min 300 Yes Yes Yes Yes
10 min 600 Yes Yes No Yes
15 min 900 No Yes No Yes
30 min 1800 Yes Yes No Yes