My Phillips Sonicare electric toothbrush does not hold its charge for long. How do I open the case and what sort of batteries does it take?

Barney, September 2009

By the way the brush head may pull off leaving short metal spindle -obviously grip this in vice and try again as it will work.You could try a squirt of switch cleaner,or swap the on/off switch for the one below it if you are careful soldering. i dont use the lower switch anyway and they look alike

Al, December 2009

Prise off the small oblong rubber block near the top (not sure if this is essential but I did),then screw on an old brush head.Put brush head in vice then tug the main body till the outer case sides off-it is tight and seems to be glued with a powdery type cement. Yo will see the batt. which looks standard C ( I think).Did not take out batt so cant comment on that bit but it does not look too tricky.I stripped mine cos the rubber switch cover had split and would have let in water-so sealed it inside and out with silicone also used for sealing on reassembly.Nothing to lose-option is to bin it,hope this helps

Al, December 2009