

They use sub-standard ingredients in the least responsible way possible, and have been the subject of multiple food outbreaks and recalls going back to the 80’s, when I’m pretty sure they were called out for using lower grade (by USDA standards) meat.
Then at some point they got caught for using Horse Meat in their food, and I think that sort of clenches it.






I’m not sure why you’d NOT want a battery powered one, because as you say, the batteries last years, and a USB powered one would waste much more electricity over time, but I digress.
If you have any mini SoC boards or ESP32 devices laying around, you can get dirt cheap 2-pin external temp sensors. Works on anything with a GPIO pin out that supports simple I/O.
Anything you find that is Zigbee by nature will be battery powered, however, you might be able to find a device with a different purpose that happens to have temp sensors that export data you could monitor.