Philips Sonicare Optimal Clean HX6829/76 Manual page 31

1 To deplete the rechargeable battery of any charge, remove the
handle from the charger, turn on the toothbrush and let it run
until it stops. Repeat this step until you can no longer turn on the
toothbrush.
2 Remove and discard the brush head. Cover the entire handle
with a towel or cloth.
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3 Hold the top of the handle with one hand and strike the handle
housing 0.5 inch above the bottom end. Strike firmly with a
hammer on all 4 sides to eject the end cap.
Note: You may have to hit on the end several times to break the
internal snap connections.
English 31