Philips sonicare DiamondClean 9000 Series Manual page 54

5 Holding the handle upside down, press the shaft down on a hard
surface. If the internal components do not easily release from the
housing, repeat step 3 until the internal components are released.
6 Wedge the screwdriver between the battery and the black frame at
the bottom of the internal components. Then pry the screwdriver
away from the battery to break the bottom of the black frame.
7 Insert the screwdriver between the bottom of the battery and
the black frame to break the metal tab connecting the battery
to the green printed circuit board. This will release the bottom
end of the battery from the frame.
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ENGLISH