The Samsung INR21700-40T is currently the non-plus-ultra of the 21700 batteries. In addition to a considerable capacity of 4,000 mAh (the manufacturer keeps here what he promises), steaming in the sub-ohm range is also no problem with a continuous discharge current of 30 A.
For all friends of mechanical mods which steam in the sub-ohm range, we still recommend the Samsung 30T battery.
