Charging The Battery Cartridge - Denso BHT-4000 User Manual

6.5 Charging the Battery Cartridge

You may charge battery cartridges either loaded in the BHT-4000 or all by themselves.
Service Life of Battery Cartridge:
A Ni-Cd battery used in the 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 deterio-
ration 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 300 cycles of charging and discharging operation.
Memory Effect:
If a Ni-Cd battery undergoes many cycles of imperfect charging and discharging
(e.g. short-time charge followed by one-hour use), the service period will become
abnormally shortened before the service life is really expired, just as the battery
memorizes the use conditions. It is called "Memory Effect."
The memory effect can be avoided by discharging a Ni-Cd battery fully before
charging with the CU-4000 or C-200.
6.5.1 Battery Cartridge Loaded in the BHT-4000
(1) Turn on the CU-4000.
(2) Place the BHT-4000 loaded with a battery cartridge onto the CU-4000.
The CU-4000 lights the CHG
After approx. eight hours of charging, the CHG
that charging is completed.
I
LED and starts charging.
139
Chapter 6. Handling the CU-4000
I
LED starts flashing, indicating
CU-4000
BHT-4000