Fenix: P3D, TK10 or TK11?

I really like these lights but each has its pros and cons...

I want to use rechargeable batteries - can I use a pair of rechargeable 123 batteries in the P3D? If so, 900 mAh x2 = 1800 mAh is kinda weak, so I thought if the TK11 can use either cr123 or one 18650 why couldn't the P3D also fit one 18650 ? It seems its the same voltage but with just a higher capacity... Thats my battery issue..

TK11 has an advantage of using a 18650 and an easier UI mode, but the low setting is kinda "high" at 60 lumen... Damn I wish I could choose both and be done with it...

Re: Fenix woes: P3D or TK11?

You can use RCR123s in the P3D. When you add batteries, either add the voltage (batteries in series) or add capacity (batteries in parallel) so you'll still have only 900 mAh with 2 good RCR123s.

2 CR123s in series(like the P3D) is 6v. 1 18650 at full charge is 4.2v, normal is 3.7v. So there is a pretty big voltage gap. The P3D wasn't designed to use 1 Li-ion battery. The tube is also too thin for a 18650 battery. 2 and 3 Li-ion batteries in series is fine but 1 won't let the light run on the higher modes for long.

A 18650 also have more volume then 2 RCR123s(16340s). A 18650 battery is 18mm wide and 65 mm long. hence the higher capacity then 2 RCR123s.

Go though what you need the light for again. Then look at which one suits you best.

Re: Fenix woes: P3D or TK11?

Since everyone should EDC atleast two lights, just go with the one that does what you like at full and add a E01 (if you don't have one) for when you need low light You might just end up using the E01 more than any other light...

Re: Fenix woes: P3D or TK11?

If im not wrong...

2x RCR123 = 7.4v x 0.9a = 6.66watt
1x 18650 = 3.7v x 2.4a = 8.88watt

One 18650 holds more power than two RCR.

Re: Fenix woes: P3D or TK11?

Tk11 is very clumsy, to much head.
Take the P3D Premium CE. (a very good choice.) :thumbsup:

Re: Fenix woes: P3D or TK11?

Thanks for clearing the battery thing up for me. It seems that getting a decent run time on either of these lights on rechargeable batteries would give the TK-11 the edge (1 18650 vs 2 cr123)

Too bad someone doesn't make a premium light comparable to the P3D that runs on 18650's...

Gunner: I thought a 123 li-on rechargeable cell had a 900 mAh capacity so two of them in the P3D would give me 1800 mAh? Unless Fenix is adding their voltages together instead!

Re: Fenix woes: P3D or TK11?

I run a pair of Tenergy 900ma's in my P3D. they haven't let me down.

Re: Fenix woes: P3D or TK11?

zband said:

Too bad someone doesn't make a premium light comparable to the P3D that runs on 18650's...

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It would be nice if Fenix did that. The Tactical series lights are good but the P/L series are more versatile. Maybe in the future...

Re: Fenix woes: P3D or TK11?

The P3D uses a buck circuit, which lowers the voltage to what the LED needs. So the total battery voltage has to be above the LED's voltage, which is usually around 3.7v at the driver current they are using. The driver itself also needs some power to run so it then battery probably has to be over 4v for the light to run properly. 3v won't won;t run the light. A Li-ion at full charger will only run the light for a short period before the lights starts its low battery warning.

In the P3D, the batteries are stacked one above another, in series, there is notin between the batteries so there is no chance that the batteries will be wired in parallel. When you arrange batteries in series, you add up the voltage instead of the current.

Fenix doesn't make batteries.

TK10 TK11 which one for me

Re: TK10 TK11 which one for me

abarth_1200 said:

What would you guys go for, i do want the option of converting to 18650 cells at a later date can you guys help me out:thinking:
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Well there is your answer. Only TK11 can take 18650's.

Re: TK10 TK11 which one for me

i know, there are a few other things, can you remove the tactical ring on the TK11 like the TK10 and do primary cells rattle inside the TK11 plus how about the beam pattern compared to each other, i like the looks of the TK10 from the posts on here but not seen a comp.

Re: TK10 TK11 which one for me

I'm not sure if the tacticool gizmo is removable. If you want to use rechargeables then go for the TK11.

Re: TK10 TK11 which one for me

Double post, ignore.

Re: Fenix woes: P3D or TK11?

have just ordered a fenix tk11. From what I see they are at presont the most econamical flashlight with brilliant runtime and a max output of 225 lumens truly a tactical winner well above the p3d and nitecore extreme for the sake of 20mm anyone disagree?

anyone with a TK11 experienced primary cells rattling inside

in reality, 3.7V RCR123s are closer to 550mAH capacity, while 18650s are actually pretty close to their 2200mAH claim.

So:

2 RCR123s: 4 watt-hours
vs
1 18650: 8 watt-hours

yea, around double. That pretty much sums it all up for me personally.

I have both the p3d and just received the TK11.. With the runtime of the TK11 coupled with it's throwing capability it is no contest..

The TK11 on many realms blows the P3D away.. It is more bulky and heavier but if that is not an issue, the TK11 would be my choice..

Re: Fenix woes: P3D or TK11?

BigD64 said:

I run a pair of Tenergy 900ma's in my P3D. they haven't let me down.

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+1

Does the TK11 really stomp on the P3D for throw?