Philips Sonicare Essence Two rechargeable Sonicare toothbrushes HX5352-46 1 mode 2 brush heads - Manual (Page 16)

2 Insert a screwdriver into one of the slots
located near the top portion of the handle,
push the screwdriver blade into the handle as
far as it will go, and twist the blade. The housing
will begin to split.
3 Remove the screwdriver and repeat the above
instruction using the other slot located on the
opposite side of the handle. Twist the blade and
the housing will continue to split.
4 Now, insert the screwdriver into the middle
slot located on the top front part of the handle
as shown and push the blade in as far as it will go.
5 Now use the screwdriver as a lever to pry the
2 handle sections apart.
6 Pull the 2 handle sections completely apart.
7 Insert the screwdriver underneath the
electronic circuit board in multiple places.
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