Not sure of the mah, I'm sure the info is somewhere buried (Drew?), but the battery does not like to get fully drained! I charge every night when I go to bed, but the battery, depending on vape style and atty used, usually lasts people between 1 and 2 days. I, personally, get about 1 1/2. No consistent issues to really mention, but issues can come up as with any mod. But, evolv has amazing CS and will take very good care of you if something happens
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