Philips Sonicare DiamondClean Smart HX9924/11 Manual page 23

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.
8 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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