One of the tricks I have learned using the 1.5 on the Ego is not to chain vape with it, getting the Atty/Batt connector to hot is what blows the Mosfet connection, take a couple vapes and let cool, everything will be fine,,,,, sooner o later of course one or the other will go, there only Batts (right) but keep that connection cool and your good to go, chain vape it and get it super hot and you gonna blow it up. The 2ohm is my fav Atty of them all and it is very good on the Ego/Riva Batts, especially the bigger 900-1100 Batts