OK, I didn't understand that at all. That may change things a lot ... for me. I'll have to try to spend some time messing with that.
And as promised, for what it's worth, the battery calcs for the kiosk unit:
In my imagined scenario mentioned above, each transmission cycle by the kiosk unit uses 120mA for about 15ms and 40mA for about 35ms. In the worst case that it needs to transmit for over 10 seconds (I used 12 seconds for the calcs), it would transmit 240 times. That would require about 0.213mAh. When not in use, sleeping per day at 300uA would require about 7.2mAh per day.
Average would be about 7.23mAh, so a 2500mAh battery theoretically should last 12 months.
Even with the kiosk unit being used three times a day, it should last about four months. As I expect only sporadic use of about once a week, this unit's battery should not be a limiting factor for transmission times.