I did not test runtime with alkalines yet. I will buy some fresh alkalines tomorrow and then we'll find out.
According to this thread Link the A3 gave 24+ hours of light on "????"
I have both, and the hotspot is very similar...almost UV purple and oblong in shape. The Coast light is noticeably brighter with more spill and a very ringy beam, plus a forward clicky. Of course, the EO1 is noticeably smaller and can tailstand and is a twisty. Both are nice quality small lights.
Im glad I got some of you interested in this light. Theres a lot of comparison questions raised and unfortunately I dont own any of the lights in question. Im not really into AAA lights as a feel AA is a far superior platform for just a little bit more size. I feel the E01 serves its intended purpose though.
I will say this, I dont own the ITP/Olight alternative but after using my A1 for quite a long time, Im not too fond of ITPs mode switching. I had constant problems trying to get to the right mode. It was very finicky. On top of that I also owned an SA1 (XPG) that I wasnt fond of at all. The quality was decent and you get a lot for your money but I probably wont buy any more ITPs.
For those interested in buying it, please remember... This is the furthest thing from a barn burner/pocket rocket you can possibly get. Do not buy this light to impress people. Buy this light because you want a rock solid backup.
All iTP/Maratac/Olight/4sevens lights are not equal, there is no problem at all with my iTP A3, it's mostly people with SS/Titanium/4sevens-lights that have had problems.
Olight have further improved the threading to avoid contact problems in the Olight i-series.
Here are some pics of the two together. To my surprise the A3 (15g) weighs a gram more than the E01(14g) even through it is smaller. Both weights without a cell in it and not on my small scales as I appear to have mislaid them but on the DX cheap kitchen scales with a low battery.
I think the error margin is 2 grams on those scales...
Too bad they didn't use a better emitter and just power it for 10 lumens. I wouldn't mind a cheap tough light like that.
I already have the A3 (3 mode) and a tough Ultrafire 602 c (single AA-one mode) with an output of 65 lumens.
Give or take 20g. Or thereabouts:)
But I'd be utterly certain the A3 weighs more than the E01. How much more is another matter....
I believe the E01 is rated at 11 lumens.
Though my own measurements with a dead alkaline AAA would say half of that.
The EO1 is regulated for the first 5-8 hours and then has about the same of diminishing output.
I’m waiting on opinions of the new Nitecore AAA light. Hopefully the tint is better.
So we've learned that it's 11 lumens rather than 10 and that when you use a dead battery it's 5.5 lumens :)
I have the ORIGINAL Fenix E01 which is an ARC AAA.
Too bad they still aren't available. A definite classic.
Thanks Don for the side-by-side comparison!
I did not notice that either, only 15h ?! http://www.candlepowerforums.com/vb/showthread.php?322538-Review-of-Olight-i3-EOS-with-measurements-and-outdoor-beamshots
But for the runtime again:
How about DQG tiny II with 30,5mA draw on low? Would give something around 23 - 33h on low with regulation.
I´m not sure about lumens but it is definitely much less than E01´s. Compared to generic nichia CR2032 keychain, it is a lot dimmer. Compared to SC51w, it is between L1 and L2, I would estimate ~1 lumen.
Another good things in DQG:
Better tint, smaller, no glass to break (TIR), 2 modes if ever needed with great efficiency, magnet at tail, SS...
Cons: Price. You get almost 3 E01´s for the price :| Watertightness perhaps? Looks to be quite tight but I´ve not tested. Not as bright on low as E01.
I would like to see "A new E01" with new generation LED driven properly low with good efficiency, simple structure and 1-mode simple UI. I believe it would get good runtime, better tint yet be a good backup. The question is, could it reach the same low price?
My itp a3 q5 runtime test on low with alkalines ended after 24 hours. battery voltage @ 0,9v.
Far from the advertised 50 hours.
I will try the drained battery in my e03 now and see how much juice is left in there.
in this thread (still relevant discussion?) there was much talking about ITP A3 runtimes vs. E01 runtimes. personally i can only measure ITP A3 XP-G R5 because that's what i have, and i dont have any E01 sorry:
ITP A3 XP-G R5 detailed and repeated runtime tests (10440 and Eneloop AAA; no Alkaline!)
for the E01 many inet reviewers (e.g. mev) report 7.0hrs on Eneloop AAA before the output vanishes to 0.5% of original brightness (lol) called moonlight mode.
I dont have the Olight i3 .. but its advertised runtime on Low (which battery used??) is close to what i clocked with Eneloop in the ITP A3.
Amen!
A few weeks ago we had a blackout at the summer house and when I went downstairs (headlamp + flashlight all shining 
) I found my mother-in-law groping around in the dark. So I unhooked my EO1 from my keychain and gave it to her. If she can remember where she puts it she will never ever be caught off guard by a blackout again
I got a new Fenix E01 too, so here my quick observations:
- it weighs something. one can feel by bare hand that it is not as light as 3-mode aluminum keychain lights iTP A3, Bronte RA01, Tank E09 or similar. for what it does, namely producing an ugly dim beam, it is too heavy. No kidding, i got a Photon-type plasticky mini keychain light with a pure blueish beam and nice beam profile and its output seems a little higher than the E01.
- since it is so dim, to me it is 100% useless as EDC light. weight and bulkiness would be okay but the performance .. personally i need/want 100lm+ out of my 1xAAA light. for this i carry a 1xAAA light with a protected 10440: the Tank E09. That makes 200+ lumens on Hi, and 100lm on Med with great EDC runtimes.
- i like it nevertheless. i used several Q-tips with tooth paste to alter the beam profile .. but i ended up with a super shiny reflector and a non-scratched LED. the tooth paste didnt have any abrasive effect on the Nichia LED bulb. and i accept it. i will leave the LED as it is. no CPF mod. i dont want to lose lumens!
- the light feels bomb-proof and hefty. the o-ring is really thick. electronics cant be damaged by water, it's a fresh water-proof light.
- the purple anodization doesnt hold up too well .. but what can you expect from such a toy light anyway?
- the light can tailstand, and securely. How many AAA lights (with a nice keychain attachment solution) do you know which can tailstand securely too? Tailstanding ten lumens wtf, yeah i know.
- the light can run on Protected 10440's. Li-Ion cells wont fry the driver nor the electronics. Run on 10440's, the light is *not* much brighter. It is brighter, yes, but not much. Clearly, Li-Ion's will not ruin the E01, i did longtime test runs for hours.
- the Fenix LD01 pocket clip fits 101% on the tail area for bezel down carry. since the light is so dim it doesnt make sense to reverse the clip for clipping on a baseball cap. you could reverse the pocket clip, no problem.
- I was able to light up the LED with an Alkaline at 0.4350V resting voltage. When online voltage falls below 0.2800V the LED wont produce lumens anymore. In other words, you need a cell with ~0.44V or higher to start with. Vice versa, if you feed a cell and the LED doesnt flash, it means that the cell's resting voltage was ~0.43V or lower.
- loaded with an Energizer Lithium Ultimate i would see its purposeful use as emergency backup light, for example in a drawer, car, tool box, closet or toilet, that is whenever you would want to use a stupid candle to support your business haha.
- quite a few flashlight brands imitate this 10 lumen design:
- Nitecore T0
- Sunawayman R01A
- Thrunite Ti
- Arc AAA Premium
- Niteye NE01
- (a.o.)
I dont regret owning this toy light. I am going to use it or maybe include it in my EDC rotation for the sake of using it. My copy was FREE as part of the 30$ LD01/E01 combo pack. Interestingly there are no XXXFire models on the market which imitate the design and try to be much cheaper. Imho, anything between 9.99-11.99$ are a fair price for this original brand name product. If you pay more for it, let me know and i will laugh at you. sorry haha. MSRP is 15.99$.
Final verdict: If you are a true budgeteer, then i dont recommend buying it.
Hi,
Is the Fenix E01 And E40 i have ,usable as bicyclelight?
Good, too bright, or to weak?
Remco
E01 is too weak but car drivers will CU bye