@srnet Yes. I had used "RH_RF95.h" last year when playing with the sensors for the property. And I had used the sleep mode. Unfortunately a hard drive crash lost all of my trials from that time. The main reason for going back to this library was that I knew it did have a built in sleep mode as opposed to the reliableDatagram, etc. Back then I had coded a feather and tracked the battery life through reception on another feather and the serial interface that marked each transmission with time and battery life of the remote unit. One capture showed it did go about 9 weeks (4/7/22 to 6/14/22) with 1124 transmissions. But that info is kind of useless as I don't have the actual capacity of the battery. Still, it was a small poly, so I was suitably impressed.