tough questions fo me to answer G.O. .. it seems there must be a back and forth.. between sensor and app.. when that happens, more power is used from the sensor.. thats the only thing I can think of that would cause the 3 month lifespan of the sensors battery.. unless I had a sour battery in my front wheel !! .. in the past, when my app allowed me to use the "only when app is turned on" my batteries lasted 7 months if I recall .. back then, they weren't able to talk to each other when I was close to the bike.. (100 ft) I'm guessing.. now the fobo2 app has more features.. that might play a part..

gps is on it now, but that would come from my phone's battery .. I have another email that should be answered tonight.. we will see what Hazwan has to say.. unfortunately I am not asking the right questions.. now my hopes are for a sour battery.. we will see how long my rear sensor lasts..