Then comes to mind... "What about all those 18650 batteries I have"? In addition to this thought, I'm wondering how safe are these batteries compared to being cozy with the 18650. Not to mention how on earth do I charge these things? Just makes my head scratch. While the chip itself is great, but the battery life also bugs me. Already have enough saved up "points" to either pour onto either a dna 200 shark or Hotcig.