I’ve had a few small keychain lights, none of them even really compare to the Olight I3E EOS.
It ticks every box for a keychain light (for me).
Small, powerful, lasts ages, tough and light. I am not a fan of rechargeable lights for keychains, the reason being little lights with rechargeable batteries don’t last long and if you forget to charge them regularly they are handily dead when you most want them, or run out halfway through a job. With an AAA light I can get a spare battery from almost any location easily, if I’m at work and it’s flat they are easily accessible and I don’t always have time to recharge something, I need it ‘now’ so to speak. It is single mode but that is all I need on a keychain - I don’t live in the wilderness so no need for blinkies etc
I really like those tiki type lights, but their size makes them more a pocket edc light than a keychain light in my opinion.
Maybe make a titanium version of it…… because it does get rubbed a lot.