40
Before Using the Handset
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While charging, the handset may not be turned on even when
the charging lamp is illuminated in red. Charge longer and try
turning the power on again.
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Frequently recharging the battery when its power is still
remaining enough may shorten the usable life of the internal
battery. It is recommended to use the battery to a certain level
(e.g. after the battery level decreases) before recharging.
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When the battery becomes warm, charging may automatically
stop even if the battery has not been fully charged. Charging
automatically resumes after the temperature lowers to an
appropriate temperature.
Internal battery usable life
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The internal battery is a consumable product. Battery life per
charge is gradually reduced every time the battery is charged.
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When battery life per charge is reduced to approximately half of
the default time, this means that the internal battery is
approaching the end of its usable life. In this case, it is
recommended to replace the battery as soon as possible. For
details on replacing the internal battery, contact the number
listed in “Repairs” (in Japanese only) on the last page or a repair
counter that DOCOMO specifies.
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If you watch videos, etc. while charging for a long time, the
usable life of the internal battery may become shorter than
estimated.
Charging with AC adapter
When charging the battery with AC Adapter 07 (sold
separately), operate the following steps.
1
Insert the Type-C plug of the AC adapter
horizontally into the USB Type-C connection
jack on the handset
2
Erect the AC adapter power plug and insert it
into an outlet
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The charging lamp illuminates and charging starts.
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Even when the battery is fully charged, the charging lamp
does not turn off.
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