Title: Battery compartment is the weak point
Product review: I've bought two of these tooth brushes and both have had the same problem: the battery compartment. The black o-ring within the battery compartment is the cause of the trouble. It either prevents the proper closure of the battery compartment, as other reviews have noted, or it eventually breaks entirely, allowing even more moisture inside. I've tried to find that particular o-ring in hardware stores, the Crest website, and elsewhere, but have not succeeded. If Crest would make them available, these units might last a lot longer. When they work properly, I really like these brushes, which is why I bought a second. However, until the company either supplies the o-ring replacements or, better yet, develops a new design for the battery compartment, I would strongly discourage people from buying this product.
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