Denso BHT-800 Series Operator's Manual page 16

Step 1 Charging
The BHT's battery cartridge is not charged when purchased and must therefore be charged prior to
use.
The following chargers can be used with the BHT.
Communication units: CU-801, CU-811, CU-821
Battery chargers:
* The CH-201A is a charger to separately charge the battery cartridge on its own, while the CH-851
and CH-854 are stationary models for directly charging the battery cartridge placed in the BHT.
The charging time is approximately 3 hours.
• The charging time is approximately 7 hours using the CU-821 with power supplied via the USB port.
• This time will be reduced for a battery cartridge with low discharge capacity.
■Charging by the BHT
Place the BHT on the charger.*
The LED illuminates in red and charging begins.
The BHT indicator LED will change to green when
charging is complete.
indicator LED
Communication unit
* Refer to "How to Replace the Battery Cartridge" for how to insert the battery cartridge into the
BHT main body.
• Remove the battery cartridge from the BHT main body or the charger and store at cool and dry place,
when you don't use your BHT for an extended period of time.
• Check the condition of battery cartridge on the following points before you store it for a long time:
- If the battery is full charged (a state right after charge is completed), and
- If the remaining battery level is very low (there is not enough power left to activate the BHT).
Long-term storage under these conditions may deteriorate the performance and life of the battery
cartridge. You are recommended to ensure that the battery cartridge is at least at the
level required for long-term storage
In addition, even you don't use the battery cartridge for a long term, keep this power level by
recharging once a year in order to maintain the battery performance.
• The battery cartridge may swell over the years. This is a natural characteristic of a lithium-ion battery
and is not safety hazard.
CH-201A, CH-851, CH-854
■Charging by the battery charger
The LED will turn red when charging is
commenced.
The LED will turn OFF when charging is complete.
Battery charger CH-201A
-9-
LED
(PTO)
charge