The QC on this stuff is not that great to say the least. It could be that the Ohm's on the atty is wrong, this has happened before. If you have a meter you can test it and see if it is in fact 2.8. Just a thought
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I like the Vision Spinner for a battery 1300mah and Vision Vivi Nova for a delivery device. Both are very easy to use. Juice is a whole other story. Good Luck!