I am using a Smok Alien 220. Have 3 pairs of cells. 2 green pair Samsung 25R5s and 1 pair LG HD2s. I usually vape this mod at around 100 Watts, with a 0.15 ohm coil, until the battery life indicator is all the way down. The voltage reading on the mod never drops below 4.0. The amp draw reading averages around 26. Is this ok?