hey trichman ...
Yes, there are no issues with the .1's ... whether that be Prodigy or ICON. Both carry upgrades over the V3 and V1. With that said, some units will need to have the switch adjusted (by inserting a washer that takes about 30 seconds) simply due to the fact not all batteries are created equal. Otherwise, you should be fine.
The ICON 14500 is pretty equivalent to the Mega eGo Battery minus the fact its much cheaper to replace the 14500 than eGo batts
If you get 8 hours with a Mega eGo, you should get atleast 7-8 with the ICON assuming your
vaping habits don't change.
Me personally, I get about 5-6 hours with a 14500, but I go through 6ml of
eliquid per day, and almost never set it down.
Enjoy trichman!