See here for one technique:
I haven’t tried this yet myself.
Yeah, I think you are right, Catapult V6 will step down from the MAX output, when either the temperature is too high or an internal timer like that is expired. However when the battery voltage is not high enough, the output of Turbo will then be reduced to a lower value (the MAX is no longer available). At this time the internal timed step-down seems disabled, and you can have V6 stay in Turbo as long as the temperature is not too hot.
And BTW, the included ThruNite battery is not powerful enough, you may get a Shockli 5500mAh or Keeppower IMR 6000mAh instead (both with PLB 55A inside).
^
Thanks
Yes, I have 2 X Shockli 26650 5500mAh batteries. My V6 is actually modified but still has the stock UI/Driver. Just had a current boost and a NW 5000K LED put in.
V54 is working on one of his DriverVN’s for the light where I can eliminate the step down or have to timed for several more minutes or the thermal Step down Temp. set much higher. :sunglasses:
My guess is it is NOT a thermal step down, otherwise I would not be able to continue to bump back to turbo. I have used this light for Forty minutes[leather hands] and only turn it off to change battery. It definitely cools off pretty fast once it is off…and in a short time, ~ 1 minute b/w battery change and using my hand to absorb heat b/4 I turn it back on!
My Specs.
But will the Keeppower 6000 fit.
I do not know. The Shockli 5500 and the Orbtronic 5750 cell will,they are supposedly the same cells.
Mt. Electronics sell the Shockli and Orbtronic sells the Orbtronic! I would go with either of them…Guaranteed to fit.
EDIT: Ohh yes,I see you are down under. You can hopefully get the Shockli sent to you from Gearbest,Aliexpress or Banggood.
Unprotected vs protected 26650
Thrunite tc20 with shockli imr 26650
Turn on… 3820 lumen
@30 seconds… 3740 lumen
Thrunite tc20 with thrunite oem 26650
Turn on. 3860 lumen
@30 seconds… 3210 lumen
So yes. Wolf dog aka capo is right in response to his comment… And BTW, the included ThruNite battery is not powerful enough, you may get a Shockli 5500mAh or Keeppower IMR 6000mAh instead (both with PLB 55A inside).
Thanks for the info. That gives us an idea. How about using said batteries in the CAT V6?
Thank you NL AKA NT[New Throw]! 
Yes it can fit, I have tried it.
Maybe your ThruNite battery is slightly weaker than mine, or it is not fully charged, or perhaps my TC20 NW is slightly under driven. My fully charged ThruNite battery performed exactly the same as the PLB 55A for the first Turbo shot, for the first two minutes. However it heated up more quickly and was unable to sustain the 2nd shot for more than half a minute. And the PLB 55A can sustain ~9 minutes (accumulated).
Thanks toobadorz,have just ordered some.
Hi toobadorz.
Thanks for your testing.
When you say accumulated, do you mean that is the TOTAL time of turbo the battery can supply regardless of how many times you step back up to turbo?
How long of ACCUMULATED Turbo time can the PLB 55A with the CAT V6? I see you got 9 minutes for the TC20.
Hi Wolfdog,
Yes, the word “accumulated” means the runtime curves were measured by repeatedly cooling and then re-activating Turbo. I already posted my measurements for V6
~16.5 minutes. But since your V6 is driven harder than the stock version, this should be noticeably shorter.
^
Yes, I see the chart. So would that be 13 Minutes? Not quite 16 minutes.
Looks like 16:36 it dives and does not make it back to turbo.
One question. That is NOT totally dependant on the battery is it?
If a different driver was put in could the PLB-55A possibly sustain more turbo? I would think there would be enough voltage after 13 minutes to do this.
Just my guess as the guy who modded it is working on another driver.
,Thanks
Just received mine from joker145 in pristine condition. Thank you joker. 
With the stock battery the throw lives up to spec according to my meter (calibrated to known lights). The switch feels good and solid.
It does get a bit uncomfortable before the turbo/temp control kicks in but not so hot that you want to drop it. All in all a nice handheld shooter with great neutral white beam. It will be used primarily onboard the ship I currently work on by others so the usb charging makes it mostly idiot proof.
Kudos to Thrunite for making a nice compact 26650 thrower.
I have one as well, really love it , and it’s very compact for the power…Does anyone know if a protected Orbtronic 26650 will fit ??
The supplied Thrunite battery is 68.78 mm long if that helps. The Orbtronic site says 68.8 so I don’t see why not.
It might fit. It is ~2.8mm More than the 5750mAh Orbtronic cell that I am using. I would certainly go with that one. It has more capacity/More amps/Definitely fits and a few $’s cheaper.
The 5750mAh cell is 5mm from the top of the tube [see pic. below]
That would tell you that the protected Orbtronic 26650 [68.8mm] should fit but you have to take the compressed Negative “Tail cap” spring into account.
Swib and Wolfdog… thank you both !
Here is the supplied Thrunite battery. If Orbtronics measurement for the protected battery is correct, then it should indeed fit with some room to spare as you can see in the photo of the Thrunite battery which is basically the same size and obviously works in the light.
Swib gets credit for pointing out the supplied Thrunite battery.
I did measure the Thrunite battery [with a ruler!] and even though I was not using a micrometer, it indeed seems like it is ~68.9 mm.
I would still go w/ the Orbtronic 5750 20A[PLB-55A].
I agree about the Orbtronic 5750 20 PLB-55A. From toobadorz’s graph it seems to be a better choice. However it appears to be a non protected cell. Not sure if that is really important to you.