Hey guys, I literally signed up to vouch the 40a imrens. I don't expect many vets to take my words to heart and don't want to fight about it but I took a gamble with the 40 as a local shop owner was boasting his 38a (2600 MaH) imren two months ago and vouched it to hell and back. I love these things. Also one of the few it seems that has an efest 35 that performs as it was described. I ditched my sonys completely as for me they work better. I have no solid proof and can't find a data sheet to save my life but I see a lot of slander and usage of the term rewrap for batteries no one has really tried. My girl and I both use the 40 and although they die fast I sub ohm. 16 buds and my mod and battery get lukewarm at most. Performance is off the charts and I will never stop using them until I find something that performs better for me. Had a friend get the continuous 26650 from them and he now loves and vouches the company too. If you have the spare cash I would take a gamble and push it as you see fit. Just don't be afraid to try new things and use them with caution. Hope all works well and someone you all trust will give them an honest review. . Best of luck to everyone and happy vaping. Still waiting on a 50a 18650 >_<