Review: Fenix TK41

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sb56637
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Ah, and a big thanks to trooplewis for kindly loning out your light for review!

Budget Light Forum ...where Frugal meets with Flashlight!

Don
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That has to be one of the most positive negatives about anything.

 

"What I don't like about it"

"It isn't mine" Smile

 

Do we see one of these in your future?

Smile

 

The numbers from my light tests are always to be found here.

https://spreadsheets.google.com/ccc?key=0ApkFM37n_QnRdDU5MDNzOURjYllmZHI...

Foy
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No, not in my immediate future anyway.  I'm not above spending a little if I happen to have it at the time (which isn't very often any more) but my days of pricey torches are probably behind me for the most part.  That's why I jumped at troop's offer to review it.  The "Budget" part of BLF seems to suit me economically quite well.

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hmm
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Can you talk about the benefits/negatives compared to the TK35? From what I gather, it's a great thrower, physically intimidating and uses more common AA batteries, but is less compact, doesn't have a clicky and more unwieldy.

okwchin
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In Short..

Pros

  • Very throwy - as good as a catapult V3
  • Side switch - comfortable grip for a torch of this size
  • Really good tailstanding
Cons
  • More throwy, but somewhat less suited for illumination of short-mid distance (doesn't have a very usable corona, tight hotspot
Subjective
  • Aesthetics - I prefer the look of the TK35, TK41 is practical and nice to hold
  • Uses AA - depends on what you normally use,  NiMH or LiIon
  • UI is the same between the two - great UI IMO
  • Beam tint is typical XM-L not excessively cool, but still a cool white.

"like everyone else - I’m looking for my next “last” flashlight" -  ohnonothimagain

SirJohn
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Its interesting that the the new TK60 is $10 cheaper than the TK41. The head and electronics look to be the same. The output is the same (technically the tk60 is speced virtually imperceptibly better) Perhaps its the result of not having to engineer the battery carrier? The Tk60 is huge with 4 d cells but you do get more run time. I wonder how well it would run with AA nimhs in d cell adapters. Do D cell nimhs handle high current draw better than AA's or is the only difference capacity? If you want a huge light, the Tk60 is an alternative to the TK41. Curious to see how the Tk70 comes out. It esentially takes the tk60 body and mates a jumbo head on it with 3xXM-L.

okwchin
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I think AAs are the better engineered battery because they are used more often. Even though 4xAA uses less volume than 1 D cell, you can get a similar capacity (about 8800mA from 4xAA Turnigy LSDs) while a D cell can be up to 10000mA but not guaranteed.

I believe if you can get your hands on 4x AA parallel adapters or even make your own, it should be pretty straightforward. 4xAA is bigger than a D cell alone, without any carrier frames, and the TK41 has a bit of battery carrier wobble while it was in the body, so there should be enough room for slightly bigger carriers too. Unless they used a narrower internal dimension on the TK60.

"like everyone else - I’m looking for my next “last” flashlight" -  ohnonothimagain

flame2000
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Hi Foy, did you try measuring the standby/parasitic drain of this TK41 (assuming you still have this with you :))?

I read somewhere the previous TK40 had a higher than average drain of ~400uA and would be completely flat in ~1.1year without lockout. Not a good choice for an emergency light.

trooplewis
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A guy on CPF had the same concern, but measured the TK 41 and got this;

TK41 the parasitic drain is 0.053 mA or 53 micro amps which is hardly anything , the TK40 was 0.400 mA

Rats, finally sold my 2010 509hp Mustang...now I can buy more lights!

Sold the red one too! Now guess what I drive, doing my penance for 500 hp commuters...

http://dreammustang.com/

http://i884.photobucket.com/albums/ac47/Ha

notsurefire
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FIRST THANKS FOR THE GREAT REVIEW , I STUMBLED ON THS SIGHT IN A DEBATE OVER THE TK35 OR TK41 STILL ON THE FENCE .....ALREADY OWN ABOUT HALF OF THE FENIX LINE WITCH INCLUDES 2 TK45'S BUT IM READY FOR THE NEXT HEAVY HITTER ......P.S. IT'S HARD TO BELIVE THAT PEOPLE HAVE THE AUDACITY TO COMPLAIN ABOUT THE DEFINITION OF THE WORD BUDGET AFTER ALL OF THE WORK YOU PUT INTO THESE REVIEWS, I FIND THEM VERY HELPFUL SO THANK YOU VERY MUCH

ILIKEFLASHLIGHTS
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That is one great review right there done by a classy guy that tells it like it is.  That's why I love the guy.  Laughing

The TK41 from what I have seen watching videos is probably one of the better XM-L throwers out there and that's going against Catapult V3, Olight M3X or Crelant 7G5.  It's got a super tight hotspot that is super bright as well.  It's definately built to be a thrower and it does that indeed. 

357Nut
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I didn't see any current draw listed so here are what I read with my new TK41.

Lo - 22ma

Med - 188ma

Hi - 678ma

Turbo - 2379ma

The voltage across the battery pack was 5.41v at those readings.  I mention this because at 5.14v across the pack current had climbed to 2655ma.

This should give everybody enough information to guesstimate runtimes.  Keep in mind that current is split between two different banks of batteries so each battery is only delivering half of that current. 

trooplewis
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357Nut wrote:

I didn't see any current draw listed so here are what I read with my new TK41.

Lo - 22ma

Med - 188ma

Hi - 678ma

Turbo - 2379ma

The voltage across the battery pack was 5.41v at those readings.  I mention this because at 5.14v across the pack current had climbed to 2655ma.

This should give everybody enough information to guesstimate runtimes.  Keep in mind that current is split between two different banks of batteries so each battery is only delivering half of that current. 

So what would you guesstimate runtimes to be on Alkalines/Eneloops?

I find it pretty interesting that on "high" the Tk41 only pulls .68A

The light output on high seems to be about equivalent to an XM-L P60 on high, which is typically pulling 2.0A or more. AMazing what a good reflector can do.

Rats, finally sold my 2010 509hp Mustang...now I can buy more lights!

Sold the red one too! Now guess what I drive, doing my penance for 500 hp commuters...

http://dreammustang.com/

http://i884.photobucket.com/albums/ac47/Ha

ezeqdb
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trooplewis wrote:

A guy on CPF had the same concern, but measured the TK 41 and got this;

TK41 the parasitic drain is 0.053 mA or 53 micro amps which is hardly anything , the TK40 was 0.400 mA

For emergency use, you can unscrew the tailcap a bit.. and have 0 parasitic drain.

"no le temo a la oscuridad, la oscuridad me teme a mí"

357Nut
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Fresh off the charger Eneloops have about 1825-1850mah capacity at that draw.  They would also have higher voltage so initial current would be somewhat lower.  If we figured 2600ma draw as an average that would pull 1300mah from each battery giving you right around 1.5 hours of runtime on Turbo and 5.4 hours on high.

Alkalines are another animal all together.  You would only have full brightness for the first 5 minutes or so and then it would be on a steady decline.  Without doing runtime test it would be hard to say.

I'm not sure what batteries Fenix was using to get 2hrs 10mins on turbo but even is we figured our current draw to average 2400ma which seems unlikely with my readings you would still need true 2600mah batteries to do it.  At that current draw (1.2amps for each battery) I haven't seen them.

Still one of my favorite lights.

Rezolution
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So what's the best place to buy a TK41 these days?  I can't find it on Manafont any more...

ILIKEFLASHLIGHTS
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I will add this has become my favorite flashlight.

trooplewis
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Buy it from a reputable seller on Ebay; several are US-based and you will get it faster than from MF.

Rats, finally sold my 2010 509hp Mustang...now I can buy more lights!

Sold the red one too! Now guess what I drive, doing my penance for 500 hp commuters...

http://dreammustang.com/

http://i884.photobucket.com/albums/ac47/Ha

Trancersteve
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I'm very tempted to buy the TK41 next month, it would be my first Fenix.

I used to be a AA powered light guy only. Early last year after diving into 18650 lithium ion powered lights, I have found myself looking at multi AA powered lights, such as the TK41 in a different light (ha).

They are cell hogs. I wouldn't like to carry too many spares around for this light. 2 hours runtime in turbo and it's time to find yourself another 8 cells (!). I know it can run on 4 cells, but we wouldn't want to feed it only 4, unless we really had no choice. High runtime is great though, over 7 hours fantastic!

Now, my feelings on this are purely because I have been spoilt with the high energy that lithium ion cells offer. 1x18650 = 3 to 4xAA

A couple of years ago I took with me an 8xAA powered light on a camping trip, it wasn't ideal. It only had one mode and wasn't very efficient (was the 5mm LED can't remember the amount of emitters maglite shower head), but having to charge up 8 cells, handling those 8 cells and carrying around spare sets was an annoyance.

It's left me thinking if the TK41 really is a wise buy for me.

I wear my sunglasses at night.

trooplewis
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BTW, thought I should mention this.

Get a 1/2" split-ring and attach it to the lanyard hole on the TK41. Then get one of your BLF-Edition lanyards that were offered a few months ago with the BLF-Tank007 clone (you did buy extras, right?) and clip it to the ring. Perfect fit, hangs all the way down, but doesn't bunch up when the light is standing on the head. Looks better than the stock lanyard IMO as well.

Still tail-stands, but a bit wobbly.

Rats, finally sold my 2010 509hp Mustang...now I can buy more lights!

Sold the red one too! Now guess what I drive, doing my penance for 500 hp commuters...

http://dreammustang.com/

http://i884.photobucket.com/albums/ac47/Ha

zaklamp
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Just bought the Fenix TK41 and i am extatic really great light i like the AA batteries, the best flashlights are using 18650 or other li-ion batteries.

This one is as good as the rest but uses AA that cool!

Keep it up fenix.

Bram
zaklamp

commando
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I have a TK41, it’s a great torch. It’s solid, well built, and really super bright – sometimes I think I could light up an aircraft overhead! But of course you don’t do that sort of thing because it’s stupid, and you can get arrested. It has low, medium, high, and turbo modes, plus flashing modes which are easy to access but easy to avoid, the controls are by the thumb and are super easy to use.

I had to return mine for repair, when I twirled it around it cut out sometimes. They fixed it promptly and apologized for the problem. Since then, no problems. I knock it over sometimes, occasionally drop it, it’s had no problems with that so far.

The 8xAA batteries rattle a bit in the case, but not so much it bothers me. If it did a small piece of foam that you stick around doors to stop drafts would probably do the job. The batteries seem to last ages, I only use it around the house but I rarely run them down, I charge the eneloops occasionally just in case.

Overall it’s a great torch, practical, well built, and reliable. Two thumbs up Smile

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