User's Manual

Chapter 6: Configuration
Suspend Threshold
102 Warrington Hand-Held Computer User Manual
6.5.4.3 Suspend Threshold
The Suspend Threshold lets you to determine when the Warrington will shut down. If the
slider is 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 will shut 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 boot.
In most real-time transaction environments this is not a problem (it only
takes a few seconds to boot). Batch transaction environments, 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 Warrington 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 Teklogix recom-
mends keeping the Suspend Threshold setting as low as possible to
maximize battery run time.
Preliminary Draft