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• Never charge the dry battery cartridge.
• The BHT has an integrated backup power source which backs up the memory and
calendar clock in the BHT when no battery cartridge is loaded or the voltage level
of the battery cartridge drops below the specified level. The backup power source
is automatically charged by the battery cartridge.
When you first load the battery cartridge after purchase or you load it after leaving
the BHT unused for a long time, do not remove the battery cartridge for 10
minutes or more after that loading. This is for charging the memory backup
source integrated in the BHT.
• Be sure to turn the BHT off before battery replacement. Replace the battery
cartridge quickly. Load a charged battery cartridge within 3 minutes from the
removal of the cartridge to avoid data loss.
After battery replacement, turn the BHT on and check its operation.
• If you leave the BHT with no battery cartridge loaded for a long time, the memory
contents will no longer be backed up so that the message "Contact your adminis-
trator. Note the error number. (XXXX)" or "Set the current date and time." may
appear on the LCD.
If you will not be using the BHT for a long time, follow the instructions given in
Subsection 2.3.5, "Battery Replacement Notes."
• Avoid storing the rechargeable battery cartridge in a hot place. The battery
capacity may be decreased.
• Do not touch the charge terminals of the rechargeable battery cartridge or stain
those terminals. Doing so could result in a charging failure.
■ Battery Voltage Level on the Status Indicator Line
The battery voltage level is always displayed on the status indicator line.
(For details, refer to Subsection 2.3.4 "Battery Voltage Display.")