I'm getting my check tomorrow and I'm looking into buying my second battery, an OVK auto extra-long. I tried asking this on another thread, but I kind of veered off of the initial subject so I didn't really get my questions completely answered, which is completely understandable. I understand that these are sealed batteries, at least the newer ones are. That is pretty much all I understand though. First of all, can I charge these using my slim charger? Secondly, what would my best choice for a cartomizer be? Should I use a tank? If so, SC or DC cart. and what ohm should I use? If not a tank, then should I use the pre-filled carts? and if so, should I buy the Cool Carts or Wow Vapor Carts? And when they are empty, would I be able to fill them back up with my juice? As you can tell, I am very lost so any help would be so appreciated. Thanks guys! I know you will get these questions answered for me.