I ask because I’ve gotten a few new lights so I thought I would rotate out a few. I’m giving my Fenix E01 to my wife and was figuring out what to do with my Inova X1. It’s not the brightest of the bunch but I wanted to keep using it for something. It’s got more lumens than the E01, but it’s also about an inch longer and a bit fatter too. So, what’s the biggest light YOU carry on your keychain?
dqg aaa iv nw is smallish enough for my keys 
I carry a coin cell light. http://www.ebay.com/itm/10-Pack-Transparent-22000MCD-Mini-LED-Flashlight-Torch-Light-Lamp-Keychain-/201011663050?pt=US_Flashlights&hash=item2ecd3a90ca
Even the smallest AAA lights are too large to add to my key chain. I carry a 1AAA in my pocket.
Jerry
I have a Photon micro on my keys for the truck and van doors. But i edc an SC52 which is pretty much Always used for everything else.
A Maglite 6D :bigsmile: Just kidding ,
I carry a Lighthound keychain flashlight link. Tiny enough not to rip up my pockets and bright enough for me to find my EDC.
A Trustfire F23 modded with Nichia 219 
Yes it is quite long and heavy, and somewhat inefficient too (I must get ~30 min at max output), but the tint is beautiful, and I get used having it on my keychain.
In fact the driver died last week, I’m waiting for a replacement, and I miss the light 
I previously had a DQG AA NW and a Thrunite Ti, but I don’t like twisties very much.
Interesting question if somebody comes up with something bigger than an AA/16340.
A. Fauxton
Fenix LD15.
Enlan I05-
Btu shocker 
I see I’m not the only one
I have a Quark Mini AA on one set, coupled with a Spyderco Bug, and an Olight A3T on the other, paired with a Leatherman Squirt.
Tank007 E09
Quark Mini CR2. Absolutely perfect size. I've had it on my keychain for a year now and have not seen anything that would make me want to change it :)
CR2 lights are perfect for keychain light. I have Nitecore EZ CR2 for more than 4 years and still working perfectly. The only decent upgrade what I see to my little light could be BTU shocker lol.
Too nice to be bathroom keys, so this must be so they don’t get lost in the couch …
Anything larger than a Photon Freedom Micro (my keychain carry) weights too much in my pants pockets. Of course, this is partially due to to cumulative weight of the micro tool, the USB drive, the keys, etc….
Grand Prix/Am key?
my main keys have a Mini-01 with BLF driver on it. My RV keys have a Thrunite Ti on them.