I have been a strictly carto guy since I started vaping 9 months ago. I use a REO Grand at 3.7v. I finally pulled the trigger and bought two LR510 2ohm attys from Ikenvape. Two and a half days later the first atty is dead. No sound, no heat, no vapor. All you ever read on here is that attys last weeks if not months. Anyone else had attys do this? At 8 bucks a piece, I think I will stick with my $1.50 cartos...LOL