I did the measurements and here are the results:
AAA Battery : On Stand by is : 25uA , On transmission is : 27mA
AAA Lithium : On Stand by is : 12uA , On transmission is : 12mA
Lithium battery consumption seems to be really low in transmission compared to using a standard AAA battery.
In my opinion probably because lithium battery does not have to increase the voltage as with a normal battery (1.5V). I measure the voltage on REED connections with a normal battery I get 3.3V so there is probably wasted engry on the voltage conversion.
your opinion ?