Update #4: a couple of days after all this, the charging indication system went back to working normally. I am guessing that this particular Pro 1500 I ended up with has a defect in the waterproofing. So, I'm saying I think water got inside and caused a short. Now that it's had a couple of days to dry, it works fine. I'm still returning it though. I got my replacement and so far, it's been working perfectly even though I still rinse the handle like I did with the first Pro 1500. Update #3: It turns out it's still charging, but the system that allows it to indicate that it's charging just stopped working. That's all that happened. So, my Pro 1500 simply lost its ability to indicate that it's charging even though it is indeed charging. I learned this by leaving the Pro 1500 on until the battery was completely drained. I then verified the battery was completely drained by trying to turn it on, and it wouldn't turn on. I placed it on the charger for 2 hours and now it actually turns on (it's usable again), but it still doesn't indicate that it's charging. So, I just discovered here that it's definitely charging even though the indicator isn't indicating that it is. Wow. I'm glad to have found this out just in case it happens to my replacement unit. Update #1: I have bad news (but I am not going to change how many stars I give this). I just used my nice new Pro 1500 and I put it on the charger when I was done (like I always do), but now it won't charge. The charging light blinks twice and stops. When I pick the handle up and try to turn it on, I have to press the power button twice. I have done this dozens of times now, and several of those times the 2nd blink would result in the charging light being stuck on. When that happens, picking the unit up off the charger and pressing the power button ONE TIME turns that light off but the unit doesn't turn on until I press the power button a 2nd time (as expected with this problem, apparently). It's like the unit is locking up on the charger. Most of the time the light just blinks twice and stops. So I currently have the unit on and I'm leaving it on until the battery dies to see if that resets this thing. If not, then I guess I'll just return it to Amazon as 'defective' and maybe get another - I really don't know if I want another one now. I mean, after this, I don't know if I can trust the Pro 1500 again even though it blows the Pro 1000 out of the water in terms of performance and battery life and charge times. I still have my black Pro 1000 and it's still working even though now I hate the inferior performance and short battery life and long charge times (the Pro 1000 has a NiMH battery while the Pro 1500 has a Lithium Ion battery). Sigh. I just can't win. Update #2: I just won, big time. Amazon came to my rescue! I just had a super fast and easy chat with Amazon that lasted maybe 2 minutes, and all I did was I asked what my options would be if I decided to return this to Amazon since it's defective. I asked if they would offer me a prepaid return label and if they would send me a replacement Pro 1500 right away or if I had to wait, etc. etc. etc. Well, the answer that they gave me blows me away: they offered to ship out a brand new Pro 1500 today with 2-day shipping for a Saturday delivery at no cost to me and they said I can return my defective Pro 1500 within 30 days using a prepaid return label. So yeah, I went ahead with that! Wow. Prior to this chat session, I was in an e-mail conversation with Oral-B and they offered me a prepaid shipping label to send my Pro 1500 to their service center for examination and possible repair or replacement depending on what they find upon examination. When I got that e-mail, I started the chat with Amazon just to see what Amazon can do for me. :) Below is my original review: To put my experience into perspective, I have a little bit of history to share so that you can see what my basis for comparison is. I bought the Oral-B Vitality on January 5th and I immediately fell in love with using an electric toothbrush. I was never brushing before, but now I'm brushing twice a day and loving it. I thought the Vitality was an excellent electric toothbrush because it was my first one, so I planned to keep it for as long as possible. Then I started doing research and I realized I could get a very big upgrade for only $40. So on January 12th, I got the Oral-B Pro 1000 and it made the Vitality seem like a cheap generic electric toothbrush.The Vitality only does 7,600 oscillations per minute but it doesn't do any pulsation action (it just does the simple rotary oscillation action). The Pro 1000 does 8,800 oscillations per minute and 20,000 pulsations per minute. This is actually a huge upgrade over the Vitality. I could tell right away why the ADA accepted the Pro 1000 but not the Vitality (or the Pro 500 for that matter)! Then I finally tried the included CrossAction brush head that comes with the Pro 1000, and then my experience became even better (the CrossAction is amazing). With that, I thought I had the best electric toothbrush I could possibly buy without buying a much more expensive one and paying for features I'd never use. So in this price range, I thought the Pro 1000 couldn't be beaten! It turns out I was wrong. Keep reading. :) I learned about the Pro 1500 recently, and after doing a ton of research on it I ordered it because it sounded like I'd feel it's well worth the cost of buying yet another one so soon. I could see from what I was reading that I'd feel it's a huge upgrade over the Pro 1000. Well, IT IS a huge upgrade! I used my new Pro 1500 for the first time today and I was almost speechless. All I could think of to say are things like, "WHOA!", and "WOW!", and "I WANT TO DO THAT AGAIN!!" I honestly didn't want to stop. I loved every second of it! I was smiling during the first minute or so of using it. I was totally blown away. In my opinion, everything about the Pro 1500 is vastly superior to the Pro 1000. Don't get me wrong, the Pro 1000 is still very nice and it's a *huge* upgrade over the Vitality (and makes the Vitality and even the Pro 500 seem like a big waste of money), but the Pro 1500 is on a much higher level and it's only $10 more than the Pro 1000 right now. With how much better it is, I think the price gap should be much bigger than that. So I'm saying that if you want the very best that Oral-B has to offer but you don't care about the Oral-B app or all those extra features and several extra brushing modes, then this is the model you should buy. The cleaning performance provided by the motor (combined with the brush head you use) is what matters the most anyway, and it blows the Pro 1000 out of the water. In an e-mail conversation I had with Oral-B, they told me that the Pro 1500 is a brand new model they made in Fall 2017 and it does 9,900 oscillations per minute and 45,000 pulsations per minute on Daily Clean mode, and 7,400 oscillations per minute and 33,000 pulsations per minute on Sensitive mode. I can definitely tell that these specs are accurate!! Again, the Pro 1000 does 8,800 oscillations per minute and 20,000 pulsations per minute, and the Vitality (and the Pro 500) just does (or do) 7,600 oscillations per minute. I still think 8,800 oscillations per minute and 20,000 pulsations per minute of the Pro 1000 is fairly adequate and I definitely enjoy it, but 9,900 oscillations per minute and 45,000 pulsations per minute is mind-blowingly awesome in comparison. It's feels like it's more than twice as good. It just feels *extremely good*. It has a cool humming sound too (at an audible 375 Hz for Daily Clean mode, and 275 Hz for Sensitive mode which seems to imply 22,500 pulsations per second and 16,500, but there are technical reasons why the audible sound is exactly half of the actual sonic frequency being produced). So that whole first experience I had today was a real pleasure, especially in comparison to the Pro 1000. I loved
