Philips Sonicare DiamondClean Smart 9500: Your Choice

Update: Just noticed I received Model #HX993R, not the HX994/61 on the box. This was a sealed, new item, so I don't know why the different model #, but that might explain why it will turn off by itself after less than two months. I just don't see how I can trust any of these toothbrushes by Phillips anymore. Original Review: I've used an electronic Phillips DiamondCare toothbrush for as long as they've been making them- at least 15 years, maybe 20. I have a lot of family in the dental industry, so that's how I got started. They used to last for years and understandably, the batteries do eventually die. Then they got less and less reliable. My last one *may* have lasted a year, and in December, I needed to replace it. My cousin (dentist) gave me a new Oral B with the round head, but I just didn't feel it had the same intensity, and I couldn't stand the little frowny face on the handle if I didn't brush the full two minutes. I never bother with the app for the Phillips (except when I first got it to try it and thought nah), so that's a non-issue. I ordered this Phillips in January and a few days ago, it seemed very weak when I brushed. I figured I must have hit one of the buttons and finally got it back on the higher intensity setting, but now it has a new quirk. After thirty seconds of brushing, it shuts off on its own. I tested it tonight and was very careful not to hit any buttons, and sure enough, it shut off after about thirty seconds. So now I'm tossed up between replacing it with another Phillips or learning to love the Oral B I was given. I do know that I've lost a lot of faith in this brand gradually over the years because I can't count how many of these I've had to replace more and more frequently. Honestly, the ones that last the longest are the ones that come straight from the dentist's office. I doubt they want their "samples" to fail so fast, but the consumer market, Phillips just doesn't care. Doubt I'll pursue a warranty because I'm pretty sure I'll just get an identical piece of you-know-what IF they even honor the warranty for something bought two months ago. I'm over it.