Is anyone else interested in a long lasting mobile power pack for your log vapes? The Vapolution battery pack is reported to work for about an hour before needing to be recharged. This does not seem to be worth it. I know that RC enthusiasts have made use of lifepo4 battery packs for this purpose, and the battery life seems to be really good with these. I wonder if anyone might be able to make a lifepo4 based power pack to market to the vape community. How much would an item like this cost? Anyone else have any interest in this?