OK so this is strange to me. I bought a brand new Samsung 25r and tried to vape it on my joyetech evic vtwo mini topped with the Vaporesso Nalu RDA with prebuilt .52 ohm dual Clapton coils fully charged but it won't vape any higher than 60 watts. However I have no issue vaping said setup only with Sony vtc6 at 75 watts for quite an extended period of time. My Samsung 25r has no issue running my twisted messes squared RDA with .15 ohm dual parallel coils at 75 watts. This is weird and a first for me if anyone could help. On the nalu claptons the 25r can't push higher than 10.5 amps roughly but on the tm dual parallels it can push 21 amps. Nalu at 75 watts it runs 6.24 volts idk if that is info needed. Any help appreciated thank you!