Ehpro Cold Steel 200 Box Mod $49.49 (USA)

Unlike it's smaller brother, the Ehpro Cold Steel 120w, this one offers a maximum wattage output of 200w. In addition, it requires two high drain 18650 batteries instead of a single larger 21700 battery. Also, it has a maximum voltage output of 8v alongside a minimum firing resistance of 0.05 ohm. In addition, it is primarily constructed of stainless steel, so it's very durable. There's also a bunch of safety features such as short circuit protection, weak battery protection, low voltage protection, and much more.