Most helpful positive review
274 of 284 people found the following review helpful
Oral-B Pro-Health Battery Toothbrush Precision Clean
on August 22, 2010
If your sick and tired of buying rechargeable toothbrushes with internal batteries that quickly loose their charge capacity and can't be replaced, then this toothbrush is for you. These toothbrushes also feature electronics that keep the motor voltage constant - and hence maintain optimal orbital brushing speed - even as the battery voltage declines as they discharge. So motor power is held consistant right up until the end when the batteries near complete depletion where finally the motor just stops. So you get optimal performance right to the end of set of batteries! This feature also means despite the lower voltage of using 2x 1.2V NiMH rechargeable cells, you get the same brushing speed and power as using 2x 1.5V Alkaline cells. This is great! as rechargeable NiMH cells last longer due to holding more charge capacity, are cheaper in the long-term, and save you throwing out bucket loads of spent Alkaline cells that would end up in landfill.
Build quality of the units is great as you'd expect for a Braun, even for a cheaper unit. The battery chamber seals well but can be perfected by applying a thin layer of vaseline or other grease around the O-ring of the lower snap out section. This guarantees moisture vapour can't get into the battery chamber which over time can corrode rechargable batteries in long term service.
The on/off switch is smartly sealed beneath a rubber membrane which ensures water can't get into the internals.
The 2-minute timer is a nice feature. At this time interval the motor briefly oscillates off-on-off-on to let you know how long you've been brushing but if you wan't to keep brushing, you can as it doesnt turn the motor off.
Overall this brush is great, especially for the price. The fact that ageing rechargable batteries can be replaced as their capacity diminishes means you can expect years of service from one of these, whereas the more expensive units with internal batteries are useless junk as soon as they loose the majority of their capacity.
I changed from using a Spinbrush Pro clean to this Braun, and the improvement is terrific. The Spinbrush ran too-slow on lower voltage rechargable batteries, the battery chamber leaked, the button corroded and became unreliable, and batteries quickly corroded due to the leaking chamber. All these problems are remedied with this Braun model.