It is easier and comfortable to get a good finish with electric toothbrush. It is not a thing of advanced technology, as the mechanisms are simple, it is just they do the work well, mere brushes per second and better control of where. One can not keep such daily constant with manual ones.<p>The batteries last one year, or two as much, after which time you will have to recharge the brush with every 2-4 minutes of use. So do not buy the more cool LED display model, etc; just go for a basic model, as all of they are mere DC motors with basic mechanism, with basic batteries.<p>The bristles of the brushes, are designed for deliberately to lose stiffness after X time (or at least it is what happens with Oral-B, two months in my case), what in my village is called programed obsolescence.<p>The inconvenient related is I can not disinfect so often as I was used with effective liquids the brush before use it, as it hardly accelerate the programed obsolescence of the brush ( By degrading quicker the colored "paint" what maintains the bristles rigid and usable). I wonder if they degrade equally with UV...<p>So I am always trying to find more resistant or durable bristles compatible with my machine, hacks, brands, etc, because after using an electric toothbrush usually one don't look back, what is my case.