You mean the 510 cartomizers run out of liquid too fast, or the cartridges for the mouthpiece? I haven't tried the 510 cartos yet (cartomizers), but I do use Kr808 cartomizers on my Hello battery a lot, and they do work for me.
A cartomizer (and I use a drip tip) to me is like a heavy duty large capacity atomizer, I put 10 to 40 drops in them (depending on how new it is), put the drip tip back on, and it's all set.
One day, I thought I had the atomizer on, not the cartomizer. I couldn't really tell because I got too busy, and I use the drip tip on both. Then suddenly I thought good grief, I keep
vaping and
vaping on the atomizer and it's still not drying up. Hahaha, THEN I looked at it and realized I had the cartomizer on!