It may be a surprise to anyone that you can not only by all manufacturers equipment gets when using a sonic toothbrush, the planned after just over two years, give up the ghost but also in consumables - ie brush heads - will rip you off. Unfortunately, there have the no-name manufacturers do not get so far to deliver their brush heads with the same quality, so you probably have to pick up the "original". At least the original brush heads are useful for 3-6 months depending on personal taste, sufficiently hard and at the same time good enough processed to have neither half of the bristles in the mouth nor in the gums.
Why none of the producers consistently for the toothbrush itself calls for a slightly higher price, the battery makes interchangeable and not tried in the follow-up costs, the customer to pull the money out of my pocket, I do not know. Apart from these brush heads are useful and I can recommend them to use - even if my eyes water at the price.