Whats your set-up with it? I was getting poor batt life with 18650's at first with my bolt.
coils were about 1.7-1.9 ohms and about 8.5 watts would kill my 18650's in about 5-6 hours. I sanded all the
threads on all the extensions and the interior where the kick sits and now I get over a full day on a batt. Yes, 20 or 30 min seems unreasonable. Check all connections, lightly sand the interior where the kick sits, and you can pick up Noalox from Lowe's for less than 5 bucks. Use it on the threads, to ensure you're getting a good negative ground connection. Also double check the batts to make sure they are functioning properly. Sometimes all it takes is to pop the batt out and put it back in to stop getting a false stutter
vape. There's a lot of trouble-shooting to do with the kick, but if all else fails, it may just be the kick. Brandon from evolv is really responsive, great to work with and really stands behind his product, he definately takes good care of his customers, so if you feel like you've exausted all other options give him a shout. Sorry for the novel, but hope this helps.