Ivoclar Vivadent Bluephase Style 20i Mode D'emploi page 12

Click & Cure corded operation
Bluephase Style 20i can be used in corded operation
at any time, but particularly when the battery is
completely empty.
For this purpose, remove the battery from the hand-
piece by pressing the battery release button.
Then remove the power pack from the underside of the
charging base. Do not pull on the power cord.
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Insert the connection plug straight into the handpiece
until you hear and feel it click into place.
During corded operation, the charging base cannot
charge the battery, since it is not connected to a power
source.
A complete disconnection from the power supply is
only ensured when the power cord is disconnected from
the power socket.