LG HB4 Butterscotch or mustardish colored 30amp continuous 1500 mAH cells. Period. Don't last long but seem to be no more or less what I would ever need in future subohm tanks and my current faves. LG HB6s I'd guess are suited for mech mods, and HB2s are independently tested as only 22amp cells. So....I guess we or perhaps just I if that shall be the case, are going to have to tolerate the missing 500mAH or so VTC4s provided for the power never changing or noticeably dropping off prematurely the way my old loves (VTC4s) had done.