The twist is 1000 mAh. The best way I found to adjust it is quite simple. Start low,and crank it up a bit each toke and when it's too hot,you will know it. Back it down a hair and you'll get a great hit from it. I bought one and ordered a second one the day after I received it. They are only 28 bucks at youvape.com . I just love this unit. Enjoy! Also,when the battery starts running down you can crank it up to compensate.