New proprietary USB charge cable? Not available.

Can't say anything bad about product quality, I've used this toothbrush for 4 years now and the battery still lasts for more than a month. I did treat it well though, almost never depleted the 9.36Wh cell or charged it completely to 100%. Just the USB cable was over 20 bucks when it was still available. Model is Oclean One.