Eleaf iStick TC100W
The Eleaf iStick TC100W is the perfect box for everyone looking for unbeatable battery life. Most 2-battery box mods use their batteries in a series arrangement, which will double the voltage potential for highwattage discharge; whereas the iStick TC100W has 2-18650 batteries in a parallel arrangement, providing for double the Ampere potential and Ampere-hour potential which effectively DOUBLES the battery life. Capable of up to 100 watts, the iStick TC100W also features modes for bypass, NI200, Ti, SS, and three programmable TCR settings. Can use either 1 or 2-18650 batteries and does allow charging through the micro USB port.