Ok, I partially stand corrected. But let’s get a few facts straight. First, the default config battery life is 4 years, not 10. Anybody can make a device that’s not useful for the intended purpose last forever. That said, the default config is a very reasonable 400ms IBeacon with Nordic chipset and transmit power of -8dbm. The important thing to note is that it’s using 2600mAh AA batteries. That’s not your off the shelf AA, but a very high power version of the AA (roughly 2.6x more energy each). Another important thing to note is it doesn’t do any sensor reading or two way communications, it’s just doing a blip of radio broadcast 2.5x a second. Still true BLE, yes, but also very much comparing apples and oranges to an LTE-M chipset and literally anything you’d do with it.