An oldie but goodie! Kanger's very first 18650 box mod! Still a good solid and simple mod if you are using coils that don't need to go above 40 watts.
If you're still using an eGo battery and want to change up your setup, but don't want to get into all the crazy high-powered box units, then this would be a perfect fit for you, also a nice step up from using an eGo battery!
Height - 89mm
Length - 40mm
Battery - 18650 (not included)
Output Wattage - 8-40W
Protection - short circuit, over current, and over use protection