On the display, and Kevin Keys software, as well as myacurite, the signal coming down from the sensor is that the batteries are low inside the 5in1. I should get a year easily out of the batteries, but I am only getting a month or two, then the lights come on. WHen I test the batteries, they are always about dead. It seems to happen after a period of high winds. I will need a new 5 in 1, or have to wait for the atlas... while continuing to replace batteries, which is probably what I will do.