Second, we create a mathematical model of each device using the collected data from the previous step. This model is the backbone of our LoRaWAN Battery Lifetime calculator and allows you to input the right data for your specific use-case of an MClimate device. You might notice that we've also incorporated a variable "Battery performance". As we recommend using Energizer Lithium Ultimate (L91) AA batteries, we've fixed this to 80% as recommended by Energizer, but you are free to also choose other values.