Review (1/5): Planned Obsolescence
Here are two things Phillips will not tell you about their Sonicare toothbrushes and heads.
1) The collar that holds the toothbrush to the handle will disintegrate in a couple of months. That's what prompted this review, because they would not replace mine after it fell apart two weeks after purchasing a replacement.
They manufacturer these things to disintegrate so you will continue to buy replacements - planned obsolescence. However, I suspect their China supplier is skimping on the plastic specifications and they fall apart in weeks instead of months. (Do you think China would really do that?)
2) UNPLUG your base until you need to charge the toothbrush. If you charge it up overnight, then unplug the base, the toothbrush will work for four brushings per day for about a month. Then, when it signals or stops, plug the base in to charge it.
This method will allow your toothbrush to work for five years or longer. If you keep the base plugged in all the time, these NiCad batteries develop memory and will stop functioning after 18 to 24 months.
A bonus, if you travel a lot as I do, you don't have to pack the charger. Just make sure it's topped off and you're good for a month's vacation.