Dont know how to attach a link, but it is geekgirlvapers buzz-pro video. Yes they are 3.7v, 550 mah.. It is at the 2 minute mark of her video, she says it does work with the blue LifePo4 and the ultrafire 16340 but could not get it to work with the red imr. I have 3 sets of the red imr's and...