This has been a winderfyll device. The coils last week's at 17v. I cape pretty constantly, and the battery last all day or just shy of on certain long days. I'd give it a perfect rating, but the auto pull feature has glitches out fairly consistently. My gf has one as well, and has gone through 2, I've burned through 3, but whether the problem is the small occasional leak or something else, these
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