We just got a bunch of Smoktech Winder batteries in stock! They're available in both 1100mah and 1300mah versions. They're a standard variable voltage eGo-style battery with the dial at the bottom that you twist to adjust the voltage. It's clearly labeled and, though easy to twist when you mean to, the wheel isn't so loose that it'll easily switch up when being moved in and out of a pocket or set down. We popped them on a battery tester and they're every bit as accurate as we had hoped. They have a very sharp piano lacquer finish as well! 
