Questions about Philips Sonicare DiamondClean 9300 Smart

No.

Unfortunately, I can't tell you exactly, but I would rather assume 336 hours, which corresponds to a time of 14 days. But that's not 336 hours of brushing, it's 14 days of normal use without having to recharge the toothbrush! I can also say from experience that this is true. The 336 hours would be 20'160 minutes of brushing ;-) If we assume that you really brush your teeth a lot and for a long time (which may well be the case, because it really is more fun to brush with this brush) and you therefore brush your teeth for 3x4minutes=12minutes a day, the battery would then last for an incredible 1680 days. So you wouldn't have to charge the toothbrush for 4.5 years.... muahaha... sorry

Unfortunately, it is not possible to create different profiles with the app. :(

The best model is probably (as of today) HX9954/53. How big the differences are, I cannot say.

According to our information, this is the latest model.