A:AnswerSounds odd that your battery is not holding a charge long enough to finish a brushing. I would call Customer Service. You might need a new unit. The battery cannot be changed by the owner.
A:Answeryou actually are asking for a hoseless and tankless unit
Look at the "WaterPik Cordless Select water flosser" model Note: it does not have a brush function .
A:AnswerI just clean and rinse the area with a little bit of white vinegar and water and use another old toothbrush to scrub the hole and little edges.
A:AnswerThe toothbrush easily detaches from the base, and will hold a charge for a few days of use. A nice plastic carrying case for it is included. But, you can't recharge it without the flosser base.
A:AnswerI received one of these units for Christmas from my wife. The unit was charged and I saw the same thing happen. We brought it back, exchanged for another and the same thing appears to be happening. I will have to bring this one back as well. Does Waterpik not test any of their units? Do they have a quality control system in their factories?