You can blame safety regulations for that. Vape mods are just about the only consumer devices that get away with using raw Li-ion cells. The rest use cartridges or glued-in lipo.
It’s just not economical to make battery cartridges for less than $30 each. You also can’t use the same cartridge design as e.g. a power tool manufacturer since all those designs are patented and they’ll sue you if you make something interchangeable.
It’s just not economical to make battery cartridges for less than $30 each. You also can’t use the same cartridge design as e.g. a power tool manufacturer since all those designs are patented and they’ll sue you if you make something interchangeable.