Works well but may not be environmentally friendly [SEP] I have had the Oral B Vitality toothbrush for about a year. It really does a great job, and my last dental visit was my best ever - no cavities or gum issues, my dentist was impressed. I've tried both the single and dual action heads, and have a preference for the latter (it just feels like it cleans better).<br /><br />However, I have one major complaint. After only a year, the toothbrush has stopped charging. (This after I fully discharged and recharged it regularly, like they say you should.) I suspect everything in the product works well, except for the rechargeable battery locked inside. However, I must now throw away the entire thing - charger, plug and all - because I cannot change the Ni-Cd battery itself.<br /><br />Braun, please make this product more environmentally friendly...