Have been using exclusively LR atty's on my eGo's since June. Carry 2 with me at all times in case of failure and keep 1 battery charging at all times. So I have been alternating three batteries for about 7 months. Using the 650 mah batteries and 1.8 ohm atty's.
So far, the batteries all work fine, and seem to hold charge as long as when they were new.
I've read that LR atty's ruin batteries but I sure haven't seen it. I suspect this may be a case of "my battery failed so it must be the atty." ( All batteries will fail eventually with ANY atty !)
Also, my battery life between charges seems about the same with a LR atty as with a normal atty. I attribute this to the fact that you don't have to hold the button down as long with a LR atty since the vapor shoots out much quicker !
The LR atty's don't last as long, however. I'm averaging about 21 days per. Got about twice the life from regular atty's, but much less vapor !
Bottom line is that I would never go back to a regular atty.
PS. One time I thought my eGo charger was bad and I used the little (200 mah? ) 510 batteries with the 1.8 ohm atty for a whole week. Once again, no problem with even these tiny batteries. They worked fine, but didn't hold their charge very long, of course.