@Ekstasis, what Nitecore is saying is absolute crap.
Not only is the Samsung 48G 21700 a 10A cell in a 30A light, meaning they cut costs, but the 30mOhm contact thing is quite crap.
There have been sub 10mOhm springs for a while now. They just wanted to justify putting a non replaceable incapable cell inside of a flashlight for cost-cutting and profit making.