I am using a Smoketip KR808D-1 with standard 3.6v 250Mah batts. Can anyone recommend a longer life battery that will work with my KR cartos. I just got V9 Turbo carts (still waiting on the juice), and I'll be staying with them for now. I saw the Cig easy Elegant manual 750Mah and wondered if something like that would be good. I want a batt with a decent cut off time that works with KR cartos. If I need to get a different charger, please tell me. Thanks for any help.