Philips toothbrush hx247m has no power prompt.

1. When the battery of Philips toothbrush HX247M is low, it will send out three short message numbers and a long signal prompt tone. It is recommended that you charge in time after hearing the prompt tone. If it is not charged in time, the toothbrush will not work properly. In addition, when the battery is low, the indicator light at the bottom of the handle will flash to remind you that you need to charge.