I just recieved my Tk11, Ultrafire charger and 2 AW 18650. It surprised me when the batteries came fully charged. I have a T1 with the OP reflecter and i really wanted to compare the two. I saw a review about a week ago about the Tk11 and it included pics and video. I was amazed to see how bright and how much throw it had. Well I compared the two lights and right away notice the huge dark cree ring around my hotspot, I mean this thing is huge. It gets worse up to a certain distance the hotspot and spill are completly diconnected. This was upsetting. Since the Tk11 has the smooth reflector i would think i would have a noticable throw differnce compared to my OP T1. No this is not true the TK11 beam is tighter but does not have more throw. Is what you all are getting to, because im going nuts.
Disapointed with Tk11
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Metatron
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send it back, seems somethings wrong there.
Daark
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You got more "POWER" if you use two RCR123. More voltage = More bright light. (without Cree rings) Two recargeable RCR123 will give you 8,4 volt. That's much better..than what a lonely 18650 will give you: only 4,2v. (poor light) :green: the lonely 18650 will only give you more run time.
I believe the power differens are: 2000-4000 Lux. between this two batteries type, 2xRCR123 VS 1x18650. :thumbsup:
I believe the power differens are: 2000-4000 Lux. between this two batteries type, 2xRCR123 VS 1x18650. :thumbsup:
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The term 'regulation' seems to be completely new for you?
Regulation means, that a light supplies the led with the same current, independent of the input voltage. If the output changes with changing input voltage, either the regulation circuit is low-quality/faulty or the voltage is outside its specified range.
Besides, two rcr123 are pale compared to a single 18650 cell, when comparing the possible energy output. (5 vs. 8 W/h)
specs + graph at fenix-store shows identical output with more runtime for 18650
(as should theoretically be, with regulated lights)
AND
the rings come from less than perfect reflectors.
Why should more output suddenly produce no rings?
@OP: why surprised about the charged batts?
If low in voltage that would be bad. Also Li-Ion keep their charge for a long time.
Unfortunately one of the tactical models has been chosen for 18650, I am with You, disappointed.
(as should theoretically be, with regulated lights)
AND
what You want to say with this? :thinking:
the rings come from less than perfect reflectors.
Why should more output suddenly produce no rings?
@OP: why surprised about the charged batts?
If low in voltage that would be bad. Also Li-Ion keep their charge for a long time.
Unfortunately one of the tactical models has been chosen for 18650, I am with You, disappointed.
Marduke
Flashaholic
Sorry, but that is incorrect on every level. The TK11 is the same brightness on either battery.
I dont know if this is what the OP was referring to, but full charge is not good for storing the batteries.
Under normal room temperature rechargeable lithium batteries suffer 5x bigger permanent damage (around 20% / year) to their maximum capacity than the ones stored in 40% charge.
Source: http://en.wikipedia.org/wiki/Lithium_ion_battery#Storage_temperature_and_charge
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Daark
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For example take one of mine LumaPower MRV SE. When i only use one 18650 cell, then the light is weak if i compare with two RCR123.
There is a very BIG difference. Maybe it's not the same result with TK11?
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Uhh whatever you do, don't put in two RCR123's in the TK11. The TK11's circuitry is designed to accept an input voltage of only 6V (~4.8V nominal), and two RCR's would result in a total of 8.4V (~7.4V nominal). This would fry the electronics and probably the LED as well. And yellow is right, a flashlight's beam shape is not defined by light output but by factors such as reflector design and the LED itself.
LED's aren't like bulbs, which are voltage dependant and will dim in output as the voltage supplied to them drops. They require minimal voltage (in comparison) and their brightness is instead mainly defined by the current supplied to them. As long as a driver is designed to properly supply power to the LED out of a battery set (be it 2*RCR's or 1*18650), the brightness should not be affected by factors other than the type of LED and how it's being driven.
Anyways sorry about the rant. Someone please correct me if I am equally misinformed.
Daark
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Then i believe it's a much better deal to buy a old TK 10, who can handle two RCR123 (8,4 voltage)
Marduke
Flashaholic
The MRV is buck only, so the voltage must stay well above the Vf of the LED. The TK11 has a boost circuit so it powers the LED the same no matter what.
TK10 runtime on turbo with two RCR123s is 1 hour, TK11 should have more than 2 hours with one 18650.
If one hour with rechargeables is enough for you or you use light mostly in general mode and if you prefer a smooth beam then you should take TK10.
If you need more than 1 hour with rechargeables and if you need more throw and can live with cree rings then go for TK11.
TK11 has buck/boost circuit.
DM51
Flashaholic
There's quite a lot of nonsense and contradiction in this thread.
Daark, you seem to be floundering around here - perhaps you should do a bit more reading before making pronouncements. jupello, you shouldn't believe everything you read in a wikipedia.
The thread is getting confused with all the conflicting advice, so I'm closing it. It was unnecessary anyway, as there is an existing thread on the TK11. Please continue there.
Daark, you seem to be floundering around here - perhaps you should do a bit more reading before making pronouncements. jupello, you shouldn't believe everything you read in a wikipedia.
The thread is getting confused with all the conflicting advice, so I'm closing it. It was unnecessary anyway, as there is an existing thread on the TK11. Please continue there.
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