Review on VSITOO S3 Pro App Controlled Smart Mug Warmer with Double Vacuum Insulation - 14oz, IPX7 Waterproof, Sliding Lid, 4-Hr Battery Life by Cindy Vang

Update: The issue with this mug is user error. The book doesn't say to turn it off. Or don't charge if there's anything left in it. i learned something It has a sensor so it knows if there is any liquid left in it. That way it stays on and doesn't turn off automatically if there's liquid left in it. Here are some tips to make it work properly: Don't even charge it with a drop of coffee. Do not charge it while it is on. Turn it off before charging. It is similar with laptops. When plugged in, the battery charges more slowly, if at all. So I compared the battery in the app as it shows the battery level. I charged it with liquid while it was on. I checked the battery level after 2 hours of charging, it was less than half. So I rinsed it, dried it and turned it off, then charged it for the same amount of time. The application is fully charged. Once I started using it, the cup works much better. Hope this helps someone. Update: in less than one. The cup started turning off shortly after the coffee was brewed. I changed it to 3 stars because I had to order a replacement. Maybe I'm stupid. Charged all night and still works. This mug is amazing. I only drank it today, but it kept my cup of coffee at the perfect temperature for the allotted time it took me to stay warm. Easy setting with touch button. You can even turn it off. It had a function when it detects that it is empty and turns off automatically. The app is also easy to use. Changes from C to F. The lid that comes with the kit is entirely optional, but I can see it being useful for maintaining optimal temperature. I'm in love. Will update if anything happens like the reviews I've seen but so far so good. I also see him heating water for tea.