Denso BHT-400B-CE - Manual (Page 165)

Chapter 5 Handling the CU-400 (Option)
5.5 Charging the Rechargeable Battery
Cartridge (using the CU-400)
You can charge a rechargeable battery cartridge loaded in the BHT.
Be sure to turn the BHT off before starting charging.
Service Life of Rechargeable Battery Cartridge:
Lithium-ion batteries used in the rechargeable battery cartridge will gradually deteriorate during the
repeated cycles of charging and discharging due to its properties, even under normal use. When the
battery service period becomes shortened due to its deterioration even if it has been charged for the
specified hours, replace the battery cartridge with a new one. Generally, it is necessary to replace the
battery cartridge after it has undergone approx. 300 cycles of charging and discharging operation.
(1) Turn the CU-400 on.
The POWER LED on the CU-400 lights in green.
(2) Turn the BHT off and place the BHT loaded with a battery cartridge onto the CU-400.
The BHT turns on the charge LED in red and starts charging.
Charging time
AC adapter (CU-401/421) Approx. 3 hours
USB interface (CU-421) Approx. 9 hours
Upon completion of charging, the charge LED turns green.
(3) Take the BHT off the CU-400.
145