I bought 2 pairs each of the LG HB4 and LG HD4 18650s. I already own 4 of the same HB4s and think they're the best of all batteries after this final personal informal test. I use the Koopor Primus 300W which is why I need 4 batteries for my current favorite device. My new awesome Aspire Cleito 120 .16ohm Clapton is best using the (120W max) coil at 104W with LG HD4s fully charged and loaded into my Primus. This is 2200mAH and 25amps continuous running all 4 18650s in parallel. I had no issue with the vapor and flavor production at all, and was surprised by the tank quality before naming it my new go-to tank. About one hour later, I swapped to 4 parallel LG HB4 30amp 1500mAH-1600mAH (according to Mooch) and WOW there was a sudden and DRASTIC increase in vapor production, smoother hits, and more flavor without any gurgle whatsoever. I was turning my home into a giant cloud and I loved the taste of my bubblegum e-liquid. I thought this cannot be possible so I swapped back the HD4s 20mins later and had a decline in my overall vaping experience. Much fewer clouds, rougher hits, puffing became different. I needed to puff much longer to achieve anything near what I had been having blast out during the HB4 test. Most surprising was the lack of flavor even if it was slight. I keep hearing that I'm stupid or just silly, but let's say that's true, why the hell is everybody I know believing me when I show them the difference between an LG HB4 and ANYTHING else less amazing as far as amperage and performance? Can somebody explain this? I'm about to try the new DNA 200 firmware out with the tank and compare that to these two types of batteries. I'm puzzled because it doesn't make sense and am looking for answers. Thanks.