You can easily charge Oral-B electric toothbrushes with a travel case charger on the go. This is useful if you travel or are away from home often. Neatly store the toothbrush in the case so it's protected when you put it in your bag or suitcase. The toothbrush also charges when it's in the case. The Oral-B iO 8, 9, and 10 have a travel case charger.