My charging solution

I just got into flashlights more recently, I got a rovyvon angel eyes E8UR and then shortly after that got a wurkkos fc11c. I have heard and see people say that external charging is superior to onboard charging. I am already into rc cars and my charger supports li-Ion so I thought instead of spending 45$ for a decent charger I might as well make mine work, so I bought some 18650 terminals on Amazon for 8$ and whipped a battery tray up in cad and that’s about it. I definitely over complicated it but it was fun, and now I can make one for my 18350 cells too