Charging Rechargeable Batteries - Denso BHT-904B User Manual

BHT-904B/BHT-914B
6.1.2

Charging rechargeable batteries

When using rechargeable batteries, it is possible to charge with the BHT main body as follows.
■ Charging via the communication unit or the charger
Place the BHT on the communication unit or the
charger. The LED on the BHT illuminates in red to
indicate that charging has begun. The LED on the BHT
will change to green when charging is complete.
indicator LED
Communication unit
CU-901, CU-911, CH-921
Battery charger
CH-951, CH-954
The charging time is approximately 11 hours.
To ensure optimum charging of all rechargeable batteries, charge them using the genuine battery charger for
the battery brand.
When using alkaline dry cell batteries, ensure that the battery selector switch is set correctly. Do not recharge
alkaline dry cell batteries.
If the LED does not illuminate, it is impossible to charge the battery. Check the following items.
 Note 

• Check that the battery selector switch has been set properly.
• Check that the BHT has been placed in the communication unit or charger properly.
If the LED does not illuminate in red, remove the BHT and check the charger terminals. Then,
position the BHT again.
• If the battery is charged with the USB cable connected, it may be impossible to charge the battery
depending on the point at which the cable is connected. Check, therefore, the port to which the
cable is connected.
If the LED flashes in red, it is impossible to charge the battery. Check the following items.

(The red LED starts to flash one minute after charging starts.)
• Check that the rechargeable batteries specified by DENSO WAVE have been loaded in the BHT
properly.
• Check that the rechargeable battery and BHT unit are not contaminated.
If any contamination is found to be on either of these items, wipe it off before.
• If an old rechargeable battery which has been charged repeatedly is in use, replace it with a new
one.
• Check that the battery charging temperature is not exceeded. Normally, the battery charging
temperature range is narrower than that of the service temperature. If the battery is excessively
cold or hot, the battery performance will be adversely affected resulting in an inability to be
recharged.
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■ Charging via a USB cable
※ only BHT-904B
Connect a master device such as a personal computer
to the BHT using a USB cable. The LED on the BHT
illuminates in red to indicate that charging has begun.
The LED on the BHT will change to green when
charging is complete.
* For a destination to which the USB is connected, if a
USB power supply without a communication function
or equivalent is used, it is necessary to carry out the
setting on the main unit.
indicator LED