Review (1/5): 2 nonworking products - not Amazon's fault!
My wife and I have had an Oral B electric toothbrush for more than 5 years. We were very pleased with it, and when it would no longer hold a charge I automatically looked for a current Oral B model. I chose the 4000. The first shipment came, as always, speedily with Amazo Prime. Unfortunately, it would not take a charge - not in one hour, not in two hours, not overnight. The battery indicator lights would not blink (indicating charging), and the unit remained dead. When I reported this to Amazon I had a replacement unit on the way within the same day, and I was given prepaid shipping labels to return the malfunctioning unit. The replacement Oral B 4000 arrived yesterday. After 2 hours there was a few minor blinkings of the charging light, but the unit would only read the bottom light of 4 - nothing more. The unit did manage a 2-minute brushing last evening, but today it would not charge during the day, and this evening it only ran 30 seconds! Again, Amazon has made it easy to return, and they have promised me a refund once they receive the unit. However, the is something obviously wrong with Oral B's quality management. Two out of two malfunctioning units indicate a serious lapse. I will not be buying another electric toothbrush from Oral B; the risk is not worth it.[[ASIN:B007VXJK6E Oral-B Smartseries 4000 Professional Care Rechargeable Electric Toothbrush]]