I bought this locally around 2 months ago, and didn't save the receipt. Too bad, because it stopped working this morning. Thinking the problem might be the batteries, which had come with the unit, I replaced them and tried again. The problem is definitely the toothbrush, not the batteries. I logged on to Amazon to see if anyone else had experienced the same problem, and now realize I should have read the reviews BEFORE purchasing this, because there are dozens of reports of this exact problem! Save your money.