For continuous operation absolutely useless

I bought this toothbrush because I was tired, thanks to the integrated battery in the other power toothbrushes for 2 years always having to discard the entire unit. This brush and conventional batteries, which would it be!
At first I was too excited. The toothbrush holding with eneloop batteries loose for several weeks before they need to be loaded. Even with the battery door I had no problems so far.
After about half a year now then came the shock of last battery change. The batteries were rusty and leaking out. The reason: About the upper shaft now water penetrates into the unit.
Conclusion: You prefer a brush with integrated battery, which then stops 2 years .... eigentich a pity!