Personal Experience: You can run .08 and above builds on a 25R. Is it inherently safe? Not really no. Did I die running my batteries that hard all day every day? Nope. Did it for the first roughly 5 months I was vaping running that low, before I learned how to really build efficient coils, and different wire materials to use to achieve the faster ramp up, and harder hit, at a higher resistance.
What I can say though is that I do not reccommend it. Taking the CDR and all safety aspects of this out of the equation for this point as well. I loved running that low, the huge clouds were my thing, and from time to time still are. What I did not love was burning batteries out in 2 months, and having to constantly replace the batteries I had because they did not hold a decent charge anymore. The batteries were always cool, not ever warm enough to cause any concern for myself. I was paranoid and constantly was checking my battery temps to see if it was getting hot. I have to say the 25rs kept up very well, and stayed surprisingly cool for how hard they were being pushed. But the cost of having to replace all of my batteries every 2 months became less than advantageous. Running this low taxes those batteries beyond beleif, and will absolutely ruin the capacity they have in no time at all. I would have a fresh set of batteries go weak in just a few weeks, and then be useless after a month or so. Add in the extra juice cost(Buying premium at the time) of 30ML every 36 hours, and it got expensive to super sub ohm very quickly.
What I can say though is that I do not reccommend it. Taking the CDR and all safety aspects of this out of the equation for this point as well. I loved running that low, the huge clouds were my thing, and from time to time still are. What I did not love was burning batteries out in 2 months, and having to constantly replace the batteries I had because they did not hold a decent charge anymore. The batteries were always cool, not ever warm enough to cause any concern for myself. I was paranoid and constantly was checking my battery temps to see if it was getting hot. I have to say the 25rs kept up very well, and stayed surprisingly cool for how hard they were being pushed. But the cost of having to replace all of my batteries every 2 months became less than advantageous. Running this low taxes those batteries beyond beleif, and will absolutely ruin the capacity they have in no time at all. I would have a fresh set of batteries go weak in just a few weeks, and then be useless after a month or so. Add in the extra juice cost(Buying premium at the time) of 30ML every 36 hours, and it got expensive to super sub ohm very quickly.