Denso BHT-604B User Manual page 26

BHT-604B
 Note 
Power for the CU-621 can be obtained from a USB connection port (host computer or hub),
however, charging is not possible while the host computer is in suspend mode. Charging is
resumed when suspend mode is exited. This can be avoided using a dedicated AC adapter to
supply power. Suspend mode is a power saving function used to temporarily put the computer on
standby when not in use.
5.
Place the BHT on the charger.
The indicator LED illuminates in red and charging begins.
 Point 
After placing the BHT on the charger
when using the BHT for the first time or
when left unused for long periods of time,
do not remove from the charger for
approximately 10 minutes.
 Note 
The BHT is equipped with a back-up battery used to back-up the internal memory and calendar
clock. The internal back-up battery is charged first when charging is commenced.
Do not remove the BHT from the charger for at least 10 minutes when using the BHT for the first
time or when using after long periods of time.
6.
The BHT indicator LED will change to green
when charging is complete.
 Point 
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Charging takes approximately 3 hours.
Charging takes approximately 7 hours
when using the CU-621 with power
supplied via the USB port.
An only slightly discharged battery
cartridge should take this time to
become fully charged.
Take proper steps if the BHT indicator
LED is blinking in red.
a. Detecting the abnormal temperature
of the battery cartridge.
Charge at the right temperature(0 to 40
degree). Avoid the direct sunlight or
something hot.
Stop the charging if under the proper
environment.
b. Bad electrical contact.
Wipe any dirt from battery cartridge
terminals with refer to "Chapter 6.3
Daily Maintenance".
c. Non-completion of the charge in the
given time.
Charge again using dedicated AC
adapter if the charging was using USB
port which is weak power supplying
capability.
d. Failure or life of battery cartridge.
Replace the new battery cartridge.
Red LED ON
Green LED ON