Do you go to Japan often enough to get low cost refill heads? Panasonic also uses proprietary chargers https://youtu.be/reJnUnqJqg0?si=-l8-aoJm94GInW82&t=349 including the toothbrush? I've purchased a few Omron & Doltz sonic battery operated travel toothbrushes over the years and learned to pick up replacement heads at the same time. I don't consider JP only sonic toothbrushes a frugal option though the model in the video does look nice. Costco.com offers 3 types of Sonicare heads in a simple cardboard box (yes, I'll pay $3 shipping not to cut open that absurd display packaging) so I stock up when they go on sale. I've never tried the third party/knockoff replacement heads. The lower end Sonicare models come with a USB-A charger.