LR are finiky at best. The 1.5-17 ones die insanely fast at 3.7 volts in my experience. I use them only on a
mod I can turn down to 3 volts now. 2.0 ohm is called LR also, and I use those extensively on every mod me and the wife own. We bought about 100 of the smoktech ones a few months ago, and we have used maybe 10 of them so far. I can crank them up to around 4.5 volts and they rock, or turn them down for stealth
vaping. Increadible life out of them compared to the Joye's we will no longer buy.
Due to the fact that both me and the wifey are stuck on VV now, all out old HV attys and cartomizers just sit there. The 4 ohm ones had a good life on them, but they didn't have the performance at 6v that we wanted. We have 3 attys between 4-5 ohm, and a couple of boxes of cartomizers in the same range, and none of them ever died. Battery life was an issue, and performance so they never got stress tested enough. I only have 2 mods that go over 7 volts, my GG and my Little Sister. The GG is locked at 7.4 (which burns) and at 6 volt battery stack it seems weak. The lil sis does fantastic, but it is an UBER small VV that uses 2 10440s, So at that voltage,
batteries last about 30 mins. Fail.