The Samsung 20S is a real 30-amp battery with a 2000 mAh capacity. Due to its high output, it is one of the few 18650 with specs that allow it to be safely used in the 70-80 watt range on regulated mods. If you are using a single battery mod with a mid to high power sub ohm tank, that’s the battery you’re looking for.
$10.99(price is for reference only and could be out of date)