this review title is: clean teeth short battery life and the content is: i am enjoying this toothbrush after a good brushing job my teeth feel almost like i left the dentists the sonic waves really do dislodge plaque and leave a very clean mouthgreat for me because i travel frequently and do not feel like carrying a toothbrush chargerone odd thing though is that my first set of batteries only lasted a week i just put in a second pair of batteries and am waiting to see how long they last i brush twice a day so ordinary amount of usage i tried a pair of fully charged nimh batteries today i think all nimh rechargeables are v and the tooth brush would not start seems that it needs batteries it worked fine with ordinary alkaline batteries.there are other information for this review, one is this reviewer did purchase it and the other is 6 people think this review is helpful.