My Sonicare toothbrush doesn’t vibrate as much or isn’t that powerful.
First, make sure that your toothbrush is fully charged.
The Easystart feature on your toothbrush may have been activated. To determine this, place the handle in a plugged charger base and press the on/off button firmly. If you hear one beep, the Easystart feature has been deactivated. When you use the brush in this condition the brush will be working at its full power level. If you hear two beeps the Easystart feature has been activated, and you will feel less power.
If your toothbrush has more than one mode of operation, you may have activated a different mode with a different brushing action.
Old worn brush heads can also seem to be less effective or powerful in their brushing action. If your brush head has been in use for more than 3 months, it should be replaced with a new one.