JETBeam / Niteye MINI-1 Stainless Keychain Light

can someone tell me what kind of cord to buy for charging this light?

I have one and it's too heavy for such tiny thing - they made walls too thick. Search for titanium versions - they are much lighter(MecArmy-branded are overpriced as always, so maybe some other brand). Titanium one is 12gr, and this one is 20gr (66% heavier). Naturally, when weighing two buckets of apples 8gr won't matter, but when comparing two tiny flashlights the difference is felt immediately.

I have the copper version and gave one to my friend as well. Both have worked great for over a year, I carry it on my keychain and it has not been babied. There is even a dent in the head from where it got caught on something and still works fine. I charge it about once a month.