Enhance your smile with the Oral-B Smart 4 - 4000N Rechargeable Electric Toothbrush in White. This ultra-smart electric toothbrush gives you professional guidance on getting the most out of your brushing experience. This ingenious tool connects seamlessly with the Oral-B app on your phone, to help you achieve better cleaning results. At times I have found these distracting, you may want to customise the settings to avoid some notifications. There is the reality that most of us don’t need over a weeks battery life, but there is something to be said for having the ability to take a brush away on holiday and not having to worry about charging it! Bluetooth connectivity allows the toothbrush to be connected to the Oral-B app allowing for a personalised brushing experience

In our testing, we were able to get 66 minutes of usage time from the rush, which equates to 16 days use. At 30 second intervals, the brush will provide an audible warning via a slight pause in the brush motor at to tell you to change quadrant. Once the 2 minutes are up 3 brief pauses in the brush motor will be heard and felt.

This means that the LED sat behind the panel lights up. You get a bright red light that you won’t fail to notice. The charging stand is fairly self explanatory, but I explain more about this in the battery section of the review. Each of the 3 cleaning modes work slightly differently, with differing levels of oscillations, rotations and pulsations to achieve different cleaning effects on the teeth. Buy the Genius 9000 and although you have to power the brush on to change the cleaning mode, if you have changed the mode, it will remember it. Next time you power the brush on, it will begin in that mode. The Oral-B Smart 4000 CrossAction electric toothbrush does not do this.

Prices will vary from store to store. Quite often online retailers will have the best price, but promotions run by high street stores at certain times of the year will see them come inline or cheaper than other retailers. The very nature of being an electronic item with moving parts does indeed make the brush susceptible to failure. However, the reliability of Oral-B products tend to be very good. If you take a look at the very bottom of the brush handle, there is a recess, into which the pin on the charging stand connects to. A charging stand is provided. In the unlikely event, something goes wrong, there is as standard a 24 month warranty is provided with the 4000. This covers the battery too. Register the brush online and you get an extra 12 months at no extra cost, so 36 months or 3 years in total. Some Sonicare and Colgate models do actually achieve up to 3 weeks, but Oral-B are now much much closer in their capabilities.

To fit or remove the brush head simply align the metal with the hole in the shaft of the brush head and push the two together until you hear and feel them clip into place. With the Smart 4 4000, a 2 year/24 month warranty is included as standard from the time you buy the brush. You can find much more detail on each mode and how they compare in our article, Oral-B cleaning modes explained.