• 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 2.3.6, "Battery Replacement Notes."
•When disposing of the battery cartridge, cover the terminal pins with vinyl tape to prevent
•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 by hand 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.")
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