Denso BHT-1306BWB User Manual page 26

BHT-1300B Series
4.
Connect the dedicated AC adapter to the DC
input connector on the charger and plug the
adapter into the wall socket.
Power for the CU-1321 can be obtained from a USB connection port (host computer or hub),
 Note 
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 LED illuminates in red and charging begins.
(The LCD screen will momentarily turn gray when the BHT is set on the charger.)
 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.
The BHT is equipped with a back-up battery used to back up the internal memory and calendar
 Note 
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.
14
LED red ON