That’s not the problem.
Trying to push 30A through springs is a very, very difficult task.
Honestly, I have to say Nitecore was both lazy, greedy, and impatient in this regard.
Why? While they are right in regards that the springs would oxidize, they didn’t tell why…
Well, at 30A, any normal spring would melt pretty much instantly.
Here’s the thought process Nitecore probably had:
1. Let’s use gold plated steel springs. Oh no, they failed at 6A.
2. Let’s use gold plated dual steel springs. Oh no, they failed at 9A.
2. Let’s use dual phosphor bronze springs. Oh no again, they failed at 18A of continuous use.
4. Well, nothing on the market actually exists that can handle the load of a 100-120W light running off of a single cell.
Let’s put a 10A cell in a 30A flashlight and weld nickel plated copper strips instead.
If the engineers, or rather, Nitecore, actually put in effort into designing adequate contacts, they should’ve just looked at BLF and see what members cooked up in spring design.
They could’ve used dual gold plated BeCu C17500 springs, and they would’ve worked quite well if they had waited for a 25-30A cell.