LR cartomizers are not meant to be used on slim
batteries and can damage slim
batteries. Slim batteries should only be using standard resistance cartomizers which are around 2.5 to 3 ohms. LR cartos are meant for batteries 450mah+ like Ego, Riva 510, Kgo etc and mods.
I use Boge 3 ohm cartos on slim 510. They aren't as warm but that's what safe to use on slim batteries. I wish Boge 2.5 ohm were more available but they are hard to find. I can get 10 days use out of a Boge with thin clear juices and keeping the carto damp so it doesn't singe. For me that's about 20ml of
juice run through the carto. I use PG w/ 20% or less VG and I avoid dark/cloudy/opaque juices that drop flavoring sediment in the carto because sediment will really cut short the life of a carto, ruining the drag and wicking.
And note - if you have an automatic 510-T, never ever use its charging cable for any batteries other than 510-T auto batteries. the 510-T auto charging cable is different and can damage (as in melt) normal 510 batteries. But they can be charged with normal 510 charging cables.