Travel warning for the United States - only conditionally holiday Suitable

Got my 5000 now replaced by 7000 and noticed with horror that the charger does not support 110v more. I times for 2-3 weeks in the USA would often ride this has been a real no-go for me, I would not have found that the old charger of 5000 also goes for the new toothbrush. A real massive restriction of usability without, for me absolutely recognizable So here, reason (for toothbrush buyers in this price range, it should not be at the component price ?!). The battery is still a NiMH model and is probably after 2-3 years require Neukaufen the toothbrush with me. Otherwise, the toothbrush is great (like its predecessor), the app connection works and the travel case is real progress. Therefore, only 1 star because of the unforgivable in my opinion deterioration of travel suitability in 110V countries (And that of a US group !!) and a second for the great new travel case (the previous plastic boxes were not durable enough for my purposes). The rest is gambling or not recognizable to me further, which is why I give this no stars.