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How to charge
1 Connect the power plug to the main unit's
AC connector. (BU-300E only)
2 Insert the batteries as detailed in "How to
insert the batteries" in the instructions.
3 Plug in type (BU-300U)
Insert the plug into the electrical outlet (AC
100-240V) according to the diagram.
Power Plug type (BU-300E)
Insert the power plug into an electrical
outlet (AC100 - 240 V).
The red charge indicator lights and begins
charging the batteries.
4 When charging is complete, the charge
indicator goes out.
Be sure to disconnect the power plug from
the outlet when charging is complete.
Then remove the batteries.
Notes:
● Batteries may become warm while charging, but this is not malfunction.
● There may be static on other electronic equipment (such as a radio or television) if the
battery charger is plugged in to the same outlet. If this occurs, plug the battery charger into a
different outlet.
● Avoid charging or discharging close to a heat source (such as in front of a heater or in direct
sunlight).
● Charge batteries within the temperature range of 0
°C - 40°C/32°F - 104°F.
● When you carry the batteries, use the provided battery case to avoid damage or short-
circuits.
● A humming sound may occur during charging. This is normal and is not a malfunction.
ENGLISH
* The shape of the plug varies
depending on the country.
Power Plug type
(BU-300E)
Plug in type
(BU-300U)