i3E

The OLIGHT i3E EOS may be small, but it packs a punch. While the cost is on the higher side for such a tiny flashlight, the quality build, premium materials, and thoughtful design more than make up for it. Pros Excellent Build Quality: Feels solid and durable despite its size. Premium Materials & Design: Sleek, well-crafted, and built for longevity. Bright Output: Surprisingly powerful for such a compact light. Durability: Holds up well to everyday use—perfect for keychains or EDC. Ships with Battery: Comes ready to use, with a plastic cover over the battery to prevent power loss during shipping. Trusted Brand: OLIGHT consistently delivers high-quality lighting products. Cons Price: Higher than generic mini flashlights, but worth it for the quality. Battery Installation: Can be a little tricky to install the battery initially. Bottom Line: If you want a small flashlight that’s bright, durable, and backed by a reputable brand, the OLIGHT i3E EOS is an excellent choice. Highly recommend for anyone looking for a reliable EDC light.

Purchased on Feb '26 from olight direct. Arrived Fast, Minimal packing/plastic waste. Lifetime warranty. Came with battery. Size of an AA battery. The led is bright, brighter than my 2xAAA StylusPro so I can see how it'll eat batteries. I needed a small keychain light, this definitely fits the bill. The LED PCB is unprotected so I'll keep an eye on durability, and will update with any issues, but the oring seems snug. Mom is getting one for her mailbox key ring so I'll have a sample size of 2 to report on. Edit: after a few days I've noticed it gets a little warm. Not ouch hot, just "Hmm, that's a little warmer than expected." Gets warmer if you set it down on plastic or cloth, holding it keeps it cooler as your hands actively cool it.

I wanted to try a few AA & AAA single cell powered lights to keep handy in my laptop bag and/or on my key chain in my pocket to use anywhere the need comes up, which in my case is a fair bit. After trying a few of these "Every Day Carry" type mini-lights, this is far and away my favorite. It does not have any infrequently used adjustment features I will forgot how to use or which annoy me by coming up in the wrong operating mode, it's smaller than the others I tried out, so it does not add much bulk at all to my key fob (It's dwarfed by either of my 2 car key fobs). Simple twist on/off and a really bright light output. This is a basic EDC flashlight and it excels in that role. And just so I wasn't clear enough, it is really tiny; barely larger than the AAA battery inside. Battery life has been great although I haven't kept track and so far I'm still on my original Alkaline battery installed a few months ago. I rarely use it for more than a few minutes at a time. Sometimes multiple times a day and sometimes not for a week or more. After a few minutes of on time, it will get noticeably warm due to its high light output. That said, if I need a light for much longer than that, it's usually where I need a broader beam and I have bigger and much bulkier units for that. I know a number of reviewers have complained the top has unscrewed and come off, some others have complained it has turned on in their pocket. I keep this in my pocket all day long if I am out of the house and have never even approached either of those issues. I give it less than a quarter turn to turn off and it has never come on by itself or come apart. It's possible those users damaged, lost, removed or had the little O-ring in the wrong groove too far back. It's that O-ring that provides its water resistance and also adds friction to the LED housing that screws on/off and to provide both battery access and the on/off switch function. I haven't gotten it any wetter than from being out in the rain briefly so I can't speak to the water resistance, but I'm not planning on swimming with this or using it underwater. It's rated similarly to other EDC lights, so it should be fine submerged up to a couple of feet deep if the O-ring is intact. Can you break it? I'm sure the answer is yes, but for my purposes and in my pocket, all it's showing is a little wear and tear on the otherwise durable finish from constant rubbing against my keys and pocket change. If and when it ever breaks, I will reorder immediately. To recap - small, did I say small? I meant tiny. - powerful little light for my near distance use (usually within 1-3 feet for me), but the beam will illuminate to quite a distance - Super simple to use and no extra features you probably won't use or don't much matter in a light this small for basic use - Good Battery life, and compatible with NiMH rechargeable AAAs. You can't use a 10440 Li-ion as the voltage is too high for its LED when fully charged, plus it will likely get too hot to hold if you do. If you really need Li-Ion, look to another light. - Inexpensive - Overall a five star for its super convenience, ease of use and function. 2 year update - STILL my favorite! In 2years of use. I've had the top unscrew in my pocket once and have had it turn on once on its own in my pocket. I've maybe missed not having a tail switch vs the twist on/off maybe a couple of times, but the size and weight are just perfect and ditto for light output. I've tried AA size, tail switch types, rechargeables and always come back to this one. Paired with NiMH rechargeable AAA batteries, I usually go for months between battery changes. The others stay handy on my desk or bench, this one lives on my key chain always on my belt or in my pocket and goes wherever I go so I'm never without a light and neither is anyone else who is alongside me at work!

I'm amazed that you get 90 lumens out of such a tiny keychain light!! The exterior design is cool looking too. I can't think of a much better keychain light. Uses just a single AAA battery and will be easy to replace when it goes dead. You don't want the hassle of recharging a keychain light battery, imo. All in all, this is a cool, good performing, and inexpensive light that I really like for my keychain.

Really happy with this small, easy to carry pocket flashlight. Carry’s on my Key Rings, and does not fill up in the pocket or on a Key Ring. My first one lasted for years until a cheap key ring swivel failed. I miss that little light and this one was a replacement. The Colors seem more durable on this one. Bright Light, Bright Graphics. Recommended.

I have bought maybe six of these, and the two oldest have burned out after a lot of use. The others are working just fine, and are so incredibly tiny and useful I will probably buy more for the glove compartments and kitchen drawers. One brightness, but it makes up for that by being tiny and light, and solidly built. Very basic but very functional, and at 10 dollars a solid buy. Do note that the Olight store on the web can have sales and a wider variety of colors!

The Olight i3E is a super compact keyring flashlight that puts out just the right amount of lumens to illuminate the way walking to/from the car in a dark parking lot or searching for a dropped item. It runs off of one included AAA battery and is easy to turn on to its single brightness of 90 lumens with a simple twist of the head. Using a AAA battery as the power source is great because they’re readily available but typically I prefer the rechargeable flashlights and I really like the Olight i1R 2 Pro for that reason and the fact that the i1R 2 Pro has 2 modes (5 lumens or 180 lumens). That being said, I still really like the i3E, they’re just 2 different use-cases. I like to clip the i3E to my jacket zipper pull via a micro S-biner so I have easy access to it if needed and can quickly unclip it from the jacket when I am using the flashlight. Olight releases new designs and colors for the i3E all the time and I like to collect them and to give as gifts so it’s always fun to see what the latest release will be. Keep an eye out for sales as this flashlight goes on sale often and that’s when I typically order to save a few dollars. Overall, the Olight i3E is a great mini flashlight if you’re just looking for something that can attach to a keyring or zipper pull and be easily accessible for finding your way in the dark. The simplicity of one twist for on/off and the use of a AAA battery makes this flashlight a great choice as a backup light or a great gift as well.

We do towing, these babies are great cuz they are small enough to hold in your mouth, yet powerful! I've bought probably at least 10. Every xmas my guys get 2 more, I've bought them for everyone in my family! Also great cuz u can keep them on your keychain, sucks when u need light and have NONE! Batter life is great!