Denso BHT-8000 User Manual page 43

(2) When turning the BHT on after storage without dry cells or battery cartridge loaded:
Even after the removal of dry cells or battery cartridge, the calendar clock will work with the backup
power source for a while.
If the calendar clock backup has stopped, loading dry cells or battery cartridge and turning the BHT
on will display the following message, prompting you to set the current date and time.
Set the calendar clock according to the procedure given in Section 2.3.2.
(The indication "00/01/01 00:00" will vary depending upon the calendar clock state.)
• The rechargeable battery cartridge can be recharged hundreds of times, but it will eventually wear
out. If the operation time of the fully recharged battery cartridge is noticeably shorter than normal,
replace the battery cartridge with a new one.
• Use only DENSO WAVE-authorized battery cartridges and chargers.
• Never dispose of dry cells or battery cartridges into a fire.
• Dry cells or battery cartridges should be recycled properly in conformity with local codes and
regulations. Do not throw them in a trash. Cover their terminal pins with vinyl tape to prevent
short-circuits.
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