Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Problems with Power Dying

Bought two of these on Sept 23, 2009. One for my wife and one for me. Recommended by my dentist who said it should be as good as more expensive models.At first, my wife had problems with her unit holding a charge but it seems to be running OK now. However,two days ago while rinsing my unit and cleaning the brush under the faucet my power unit simply quit. I tried recharging it but all I get now is a little whirring sound but no action of the brush.I think the Braun Oral-B should hold up a lot longer than that, even at the low end price. I'll probably end up tossing it and purchasing a highly rated higher end Braun model.