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Fenix LD01 Flashlight

127 customer reviews
| 3 answered questions

About the Product

  • LED blasts a max 72 lumens (1.5 hrs runtime) on turbo and 3 lumens (27 hrs runtime) on low selected by simple twist of the lights head
  • Includes 3 lighting modes-Mid-Low-High
  • Body Size: 3" (Length) x .25" (Diameter); 1 ounces; Waterproof to IPX-8 Standard
  • Powered by 1 AAA batteries; easy to find and affordable (Not Included)

Frequently Bought Together

  • Fenix LD01 Flashlight
  • +
  • Energizer L92BP-Energizer Ultimate Lithium AAA Battery (4-Pack)
Total price: $57.94
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Product Description

Product Description

1 Hour run time at turbo, 72 lumens output. Requires 1 AAA battery.

A keychain flashlight with three brightness levels, the Fenix LD01 LED flashlight is an ideal pocket tool for people who want to keep it light in more ways than one.

The LD01 keychain flashlight is small enough to fit easily in the hand.
The LD01 offers three output types: 85 lumens (which lasts for one hour on a single AAA battery), 28 lumens (3.5 hours), and 9 lumens (11 hours). As a result, you can find a setting for virtually any activity, from shining a light in a dark cave to getting a closer look at a car engine. Just as importantly, the LD01 measures only 0.55 inches in diameter and 2.95 inches long, helping it fit easily in a jacket pocket or messenger bag (the light also includes a stainless-steel pocket clip for wearing in a shirt pocket). And thanks to the light's long-lasting Cree XP-E LED bulb, the LD01 shines a beam steadily for roughly 50,000 hours before burning out.

The flashlight is also well built, with a durable aircraft-grade aluminum body coated with a premium Type III hard-anodized, anti-abrasive finish. The construction--which also includes a toughened ultra-clear glass lens with an anti-reflective coating--helps the light hold up to all kinds of abuse. Other features include a reliable twist switch for easy one-handed operation, a waterproof housing to the IPX-8 standard, and a spare O-ring. The LD01, which also stands on a flat surface to serve as a candle, weighs 0.5 ounces (excluding batteries). The flashlight carries a limited lifetime warranty.


  • Bulb: Cree XP-E LED
  • Bulb lifespan: 50,000 hours
  • Lighting mode outputs: 28 lumens, 9 lumens, 85 lumens
  • Runtime: 3.5 hours (28 lumens), 11 hours (9 lumens), 1 hour (85 lumens)
  • Working voltage: 0.9 to 1.7 volts
  • Construction material: Aircraft-grade aluminum
  • Finish: Type III hard-anodized anti-abrasive finish
  • Waterproof: Yes, to IPX-8 standard
  • Accessories: Pocket clip, key ring, and spare O-ring
  • Batteries: One 1.5-volt AAA (NiMH or alkaline)
  • Dimensions: 0.55 inches in diameter, 2.95 inches long
  • Weight: 0.5 ounces (not including battery)
  • Warranty: Limited lifetime

Product Details

  • Product Dimensions: 0.6 x 0.6 x 3 inches
  • Shipping Weight: 2.1 ounces (View shipping rates and policies)
  • Domestic Shipping: Item can be shipped within U.S.
  • International Shipping: This item can be shipped to select countries outside of the U.S. Learn More
  • ASIN: B004DVIKC2
  • Item model number: LD01R4
  • Batteries 1 Lithium Metal batteries required. (included)
  • Average Customer Review: 4.5 out of 5 stars  See all reviews (127 customer reviews)
  • Product Warranty: For warranty information about this product, please click here

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Customer Questions & Answers

Customer Reviews

Most Helpful Customer Reviews

29 of 29 people found the following review helpful By tekrrr on September 8, 2011
Verified Purchase
Compact. Weighs almost nothing. Lasts a long time on one AAA cell (I change the battery once a month whether it needs it or not, just to be prepared.). The three light levels are perfect. Lowest for reading menus in dark restaurants. Medium will light an entire room when stood on end, reflecting off the ceiling. High for long distances. Excellent spot diffusion with almost no artifacts. Black anodized aluminum body is very durable. Recessed glass lens is very well protected. Only negative is a high pitched whine when placed upright on a hard surface. Barely noticeable, probably from the LED circuitry. Includes very good clip, key ring, and extra o-ring. In short, nearly perfect. Keep the o-ring lubed with a little vaseline and it will last years and make it easier to turn off and on.
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33 of 35 people found the following review helpful By James Q. Smith TOP 1000 REVIEWER on January 27, 2012
Verified Purchase
There are quite a number of reviews on this pocket LED light, generally called the Fenix LD01 Flashlight.

However, Fenix has created confusion since upgrades to LD01, with marked changes in features, carry the same product name, LD01; the products are etched with the same name, as is the box. Only the data sheet is updated with new specifications. Multiple older versions in the Amazon catalog, with the largest user reviews, are obsolete. When you order through those older items, you get this instead, the LD01 R4, which is the current version, and some users complain they did not get what they ordered. For details, I've put the full review in the correct area of the Amazon catalog Fenix LD01 R4 72-lumen AAA Keychain LED Flashlight Black - Fenix LD01R4BLK.
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17 of 18 people found the following review helpful By Amazon Customer on September 7, 2011
Verified Purchase
I really love this little light, it is amazingly bright for a single triple AAA battery flashlight. Great quality, good runtime, and a lot of fun.
I have had this light for 2 months now and have used it at least a couple times a day. I put a Energizer Ultimate L92BP-4 Lithium AAA Battery 4 Pack and have only changed the battery once. I put it on my key chain and hardly notice the addition. It is the perfect size (tiny) and doesn't add much size or weight to your pocket. I have found it invaluable to carry a flashlight all the time. On high this flashlight will light up the back yard better than my 3d Maglight. And on low the runtime is extremely long.
We have chickens that need to be locked up every night. We have plenty of lighting, but that gets the chickens all riled up. I use the flashlight on low and don't ruffle a feather, but still have enough light on high to find the occasional escapee.
Overall I can't think of a way to improve this light for my uses.
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16 of 18 people found the following review helpful By duc916 on December 5, 2011
Verified Purchase
The light this thing made with a AAA battery was decent, but after installing a 10440 lithium-ion 3.7V rechargeable battery, it's AMAZING... Power to weight ratio is ridiculous. This is how to have 200 lumens of light always available without having to wear it in a holster like a dork.

Naysayers will say it'll burn out prematurely... Well, the Cree XP-E spec sheet says it can handle a maximum of 3.9V so I'm not too worried. Check out the Fenix E05... same LED in a bigger body using a 3V lithium. Use common sense and don't leave the LD01 on the high setting until it's scorching hot and it'll be okay. It seems silly to use a AAA battery with this LED knowing it's rated up to 3.9V. Maybe it will shorten the lifespan using it this way, but that never stopped me from overclocking my computers either. CPU's always become obsolete long before any problems arise, so if you're not overclocking, you're not getting your money's worth. Same goes for this flashlight. If you're using AAA's in it, you're not using it to its potential.

EDIT (7-15-2014)
Coming up on the 3 year mark and it's still going strong with daily use of Li-ion 10440 rechargeables.
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6 of 6 people found the following review helpful By Amazon Customer on December 8, 2014
I purchased this light in November of 2009 (5 years ago now!). I have carried it every single day, all day, 365 days a year since then. It has been absolutely amazing and still surprises me every time I turn it on. I can't tell you the number of times that this thing has saved me or someone I know. I use it daily, sometimes numerous times a day or night... Over the years, I have had a countless number of people ask me about it - because they are in awe that such a small light puts out so many lumens. It's been a trusted companion.

I am sure there are people out there, who like me have no idea how this aluminum version will last with EDC. As you can see in my photo, the finish is still very good. The light works like new, and I have never had a problem yet. The glass lens has no scratches on it, and is still crystal clear. All this despite having dropped the light a countless number of times on concrete, in water etc etc.

Did I mention, that I EDC this thing in the same pocket as my keys? Even after nearly 5 years of abuse, this thing continues to serve me well. I am a huge fan of Fenix, and this light proves why.
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4 of 4 people found the following review helpful By Kent on December 27, 2011
Verified Purchase
Great pocket light. Just slightly wider, and about 1/2" longer than a "AAA" battery. Very light weight with alkaline battery. If you need hands free, You can easily hold it with your teeth or lips.

This little flashlight is extremely well made with high quality materials. It should last many years if not abused. It is so much better than the cheap lights. I have had mine now for 2 years and it works like new. I even bought another for backup.

3 light levels: The twist on works well for me. I like the fact that when 1st turned on the level is medium. Next quick twist is low then high last. Medium is perfect for most needs.

The light is even lighter lithium batteries. Lithium batteries don't leak, have a very long shelf life and work over a wider temp range than alkalines. But they are expensive.

It is very bright considering it uses only 1 AAA. Warning: this light has a voltage booster circuit, so the light does not dim as the battery runs low so you can run out of juice w/o the light dimming first.

I carry mine in my back pocket below my wallet. I never ever feel it there. It's thinner than a slim wallet. (see photo) It's always there when I need it. Luckily I haven't left it in my pants and washed it yet. I think it would survive a washing because it has "O" ring seals. Comes with 2 spare "0" rings.

Highly recommend this very well made light. So much so, I now have 3 of these. Please note that the price fluctuates between $35 and $39.95. Not all of these come with a clip, so check the description carefully.

1 year update 1-13-13: Still working perfectly. No issues. After a few months having this light it has become extremely useful. I never realized how often I needed extra light at the house, work or car.
I would buy this exact same flashlight if I lost it.
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