PSC PT2000 - Manual (Page 130)

Batteries
120 PT2000™ & TopGun™
It is best to charge the battery pack at or slightly below room
temperature. Always charge the battery within the temperature range of
50°–85°F (10°–30°C).
Storing the NiCd Battery Pack
The battery pack can be stored indefinitely, regardless of its charge state.
Store it between -22° and 122°F (-30° to 50°C). Stored batteries lose
about ten percent of their charge per month when they are kept at room
temperature. Batteries stored at higher temperatures discharge at a faster
rate.
Lithium Backup Battery
The portable contains a lithium battery as a backup to save application
program codes, collected data and system information, including the
clock setting. Under most circumstances, a fully charged backup battery
will keep information for at least 10 days if the main batteries are
completely discharged or removed. This should provide sufficient time
to recharge the battery pack without risk of losing data.
The backup battery is recharged whenever a charged battery pack is
installed as well as when the power supply is connected.
If the lithium battery is allowed to discharge, any application program
code that is resident in the random-access memory will be lost,
Consequently, when a charged battery pack is installed and the unit is
turned ON, it is likely that the operating system will detect the
corrupted application code and will display a
PROGRAM FAILED
message.
PT2000.book Page 120 Thursday, February 26, 2004 9:34 AM