The competition uses USB connectors and cables. Thus you can likely use the same power adapter for your toothbrush as you can your smartphone (as long as it’s not an iPhone). That is not the case here (excuse the pun).

IO Series 9 vs 10 (Key Differences and Specs Comparison) Oral B IO Series 9 vs 10 (Key Differences and Specs Comparison)

This is based on the results of an independent study by Cochrane. It suggests that there is evidence that Oral-B is more effective than Sonicare.Kids/Junior series: Variations of the Vitality, Pro and Smart Series brushes aimed at kids and teens. Often slightly smaller and featuring favourite characters or more colourful designs.

iO Series 9 Electric Toothbrush | Oral-B Oral-B iO Series 9 Electric Toothbrush | Oral-B

To complicate the situation further… There is an argument that smart technology and iO Sense charger could have an impact on how well you brush your teeth. If you know that you are going to take that time, then after using it for a few weeks you will begin to have a memory of where you need to go in your mouth and how long you need to stay there to make sure every surface of the tooth has been covered.A 2 pin UK power adapter is hardwired into it, which is suitable for UK bathrooms. The cord is about 1.2 metres in length. The stand supports 100-240 volts, unlike the 220-240 volts of the standard charger. This is more convenient if you are a regular international traveller. Both cases do the job. But the 9900 Prestige is sleeker and a more practical option for a regular traveller. For example, the 9900’s travel case is more compact, offers USB charging and has a Type-C connector. Compare this to the larger, cheaper looking and feeling Oral-B case. And unlike Sonicare, the iO’s travel case requires a proprietary power adapter.