It's too late now, but in the future if you order more batteries, I'd really recommend a Spinner instead of a Twist. They work the same, but the voltage adjustment markings on Twists are really hard to read, and over time they'll wear off some, making it nearly impossible to read them. The Spinner markings are very clear. Also the Spinners are slightly wider in diameter. I hardly notice the increased diameter, but the shorter length that goes with that width increase is very noticeable. My 900mah Spinners are barely longer than my 650mah Twist.
If you try any more clearomizers in the future... here's one more vote for trying evods. I love them.