So, I was wondering if any other battery would fit in the yet to be made metal 18490. I got a pair of aw imr 18490's but I'm not a fan of these type. I've been using Trustfire ( the flame ones) in my mini and am quite satisfied. I tried the aw imr 14500 but didn't like them. So, are there any batteries other than the recommended aw imr's that would fit? Thanks again.