Uwell Soulkeeper Mod is mainly designed for its battery compatibility. It has a maximum wattage of 110W and it supports 18650, 20700, 21700 allowing you the chance to choose.
The soulkeeper has an led battery level indicator as well as and electronic bottom firing switch which eliminates battery arcing.
The device is unregulated in that it provides direct power from the battery... it does however have safety features included such as,
- Short Circuit, Low Power, Overtime, Open Circuit, Temperature Protection, Reverse Battery Protection