User's Manual Part 2

Chapter 5: Configuration
Power Management Properties
100 WORKABOUT PRO Hand-Held Computer With Windows CE 5.0 User Manual
5.5.4.3 Suspend Threshold
The Suspend Threshold adjustment tells the system when to shut down when the
battery drains. If left at the default value, Maximum Operating Time, the hand-held
will run until the battery is completely empty; the RAM is only backed up for a short
period of time. If you choose Maximum Backup Time, the hand-held shuts off with
more energy left in the battery so RAM can be backed up for a longer period of
time.
Important: Selecting Maximum backup time will reserve approximately 20%
of the battery capacity for memory backup. Once the battery is
drained, the system RAM memory is lost and the unit must cold
boot.
In most real-time transaction environments this is not a problem
(it only takes a few seconds to cold boot). Batch transaction envi-
ronments, where data is not saved to a non-volatile memory (such
as an SD FLASH card), may need to pay particular attention to
this parameter. Psion Teklogix does not recommend the storage of
any valuable data in system RAM.
The WORKABOUT PRO Windows CE 5.0 environment does not
store any critical data in RAM (such as the registry or file system).
If the user's application does not save data to RAM, Psion Tek-
logix recommends keeping the Suspend Threshold setting as low
as possible to maximize battery run time.