This should be the right charger for your toothbrush.
https://www.ebay.com/i/302811230565?chn=ps&ul_ref=https%253A%252F%252Frover.ebay.com%252Frover%252F1%252F711-117182-37290-0%252F2%253Fmpre%253Dhttps%25253A%25252F%25252Fwww.ebay.com%25252Fi%25252F302811230565%25253Fchn%25253Dps%2526itemid%253D302811230565%2526targetid%253D497858303474%2526device%253Dt%2526adtype%253Dpla%2526googleloc%253D1019457%2526poi%253D%2526campaignid%253D1481353837%2526adgroupid%253D56758917509%2526rlsatarget%253Dpla-497858303474%2526abcId%253D1139286%2526merchantid%253D114693360%2526pt%253D%2526gclid%253DCj0KCQjwr4beBRDNARIsAGZaZ5cK8H0HkkVSTWGUBoyifBG4DiwlgEkC3oscVNkFIlZs5IRzeLgjQl4aAkwHEALw_wcB%2526srcrot%253D711-117182-37290-0%2526rvr_id%253D1702172343133%2526rvr_ts%253D6d2223d41660ac1f9fb56c0dfffbad49