Oral-B 3731 Smart Manual page 6

Connecting and charging
Your toothbrush has a waterproof handle, is
electrically safe and designed for use in the
bathroom.
To assemble the charging unit, insert the
protective cover (h) on the back of the base
plate (g). Then, place the base plate on the
charging ring (f) until it clicks into place.
• Plug the SmartPlug into an electrical outlet
and place the toothbrush handle (d) on the
charging unit. A battery symbol should appear
in the handle display (e). The battery symbol
will fill up while the handle is being charged.
Once the handle is fully charged, the battery
symbol will be filled with four bars. A full
charge takes at least 10 hours to complete
and allows for approximately 10 days of
regular brushing (twice a day, 2 minutes).
Please note: If the battery symbol is not
displayed immediately, continue charging.
It will appear in 10–15 minutes.
• When the rechargeable battery is low, the
battery symbol with one remaining bar starts
flashing. Your toothbrush will slow down
and then stop. When the battery is fully
discharged, the empty frame of the battery
symbol flashes. It will then need a 15-minute
charge before you can use it for a 2-minute
brushing.
• For everyday use, the toothbrush handle can
be stored on the charging unit to maintain it at
full power. There is no risk of overcharging the
battery.
• To maintain the maximum capacity of the
rechargeable battery, unplug the charging unit
6
and fully discharge the handle with regular use
at least every 6 months.
For electric specifications, see printing on the
SmartPlug.
Personalizing the timer
You can choose between the «Professional» or
«2-Minute» timer and the «Count Up» or «Count
Down» timer to meet your specific needs.
The «2-Minute Timer» indicates by a long
stuttering sound and a «smiley» on the
SmartGuide display unit that the dentist
recommended 2-minute brushing time has been
reached. In addition the «Professional Timer»
helps you brush all four quadrants of your
mouth equally. It signals with a short stuttering
sound at 30-second intervals (45-second
intervals within «Deep Clean» mode) and the
«quadrant circle» on the SmartGuide display unit
that it is time to move to the next quadrant of
your mouth.
Both timers memorize the elapsed brushing
time, even when the handle is briefly switched
off during brushing. When pausing longer
than 30 seconds, the timer resets to the initial
starting point.
The «Count Up Timer» displays your actual
brushing time. The «Count Down Timer»
indicates the remaining brushing time. Starting
with «2:00» minutes, it goes down to «0:00».
When brushing longer than two minutes, it
automatically changes to the «Count Up Timer».
The total brushing time can be extended to
3 minutes by using the «Deep Clean» mode
(see «Brushing modes»).
Your toothbrush comes with the «Professional
Timer» and the «Count Up Timer» activated. If
you wish to change these settings, proceed as
follows: