Philips HX4101/72 User Manual page 12

ENGLISH
12
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4 Turn the screwdriver handle sideways, using twisting and prying
motions, to crack open the handle along its side seams.
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5 Pull the 2 handle sections completely apart.
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6 Insert the screwdriver underneath the electronic circuit board
in multiple places.
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7 Twist and pry the electronic circuit board loose until it is
completely separated from the handle.
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8 Pry the 2 AA-sized cylindrical nickel-cadmium batteries loose
by inserting the screwdriver on the sides of the two batteries
in the locations shown in the figure.