Philips sonicare ExpertClean 7300 Mode D'emploi page 31

4 Remove the end cap from the toothbrush handle. If the end cap
does not release easily from the housing, repeat step 3 until the
end cap is released.
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 Remove the rubber battery cover.
7 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.
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