Hi Zeeb,
We have the SuperReg and TurboReg back in stock. I am waiting for my webmaster to get back from vacation to change that on the website. If you are worried about disconnecting the batteries you can also use switches. You can put two of our SuperSwitchHDs in front of the SuperReg and this problem goes away. I have left my batteries connected for up to a week without any issues. Of course if you have flown your lithiums down to 6.6V then you would have a smaller time margin.
Let me know if you have any other questions.