I've been using the Cool Fire IV 40w's for quite a while. I do love them. Can anyone compare this mod to the new Aspire Zelos? I know the Cool Fires have a lithium ion battery and the Zelos states that it's a LiPo. What difference does that make. I love the build quality of the Cool Fires. Again, comparison on build quality? I vape MTL so my toppers have been gs airs and newly acquired Ego One V2 Megas with clr 1.0 coils. With the 1.5 ohm airs, I vape at around 12.5 to 13 watts. With the Ego One's, I vape around 17 watts. I don't care about the tc function. I just use wattage mode. I could get a couple more Cool fires, but thought maybe the Zelos might be comparable with a slightly longer battery life. I currently get a full day with my Cool Fires. I just feel like adding to my stock and feel the purchase bug coming on. Any comments?