How the G5 activates its battery:
- the battery of the G5 activates when you bed the G5 transmitter into a sensor pod. There is no magnet in the packaging.
How the G4 activates its battery:
- The G4 transmitter battery activates when you remove the transmitter from the packaging, because of the magnet/microswitch.
On the G5, the Dexcom warranty is good for 3 months after you activate the transmitter, even if it is activated way past the SB date. On the other hand, once you activate it (i.e. once you have embedded it into a sensor, even if you did not pair it), it is only good for 3 months from that date.
I should probably make a wiki out of that.