How much heat can Pila's handle?

[darkgear.com]

How much heat can Pila\'s handle?

I just got my Pila's from JSB. Thanks Jon! and ran them in my 12PM with an n62. 500 lumens. I turned it on and set it on my desk. A while later, maybe 4 minutes or so, I reached for the light and it was too hot to pick up. I grabbed some towels, unscrewed the tailcap to turn the light off and took the batteries out. The batteries were too hot to handle bare handed also. I know from RC car racing that it can't be good for the batteries. Does anyone know how much heat the Pila's can handle without doing serious damage to cells.

If no one knows I guess I'll do a runtime test tomorrow and see if I can destroy that batteries with all he heat generated from the 12PM.

Best regards,
Randy

P.S. How many hours is the N62 rated for?

 

[darkgear.com]

Re: How much heat can Pila\'s handle?

Bump. Anyone?

 

[Doug S]

Re: How much heat can Pila\'s handle?

You might eventually get an answer in this thread. It's not there yet.
Plia thermal protection

 

[Nerd]

Re: How much heat can Pila\'s handle?

If I'm not wrong, the N62 is design to take a 30% flash cycle (Due to the 123s not being able to handle the current draw for long before thermally shutting down). On it for 2 secs, off it for 4 secs. As such, the continue huge inrush of current should make most filaments toast in no time at all.

Given that you are running it continously, I would hazard a guess at that you might have it last through at least 30 battery changes?

 

[darkgear.com]

Re: How much heat can Pila\'s handle?

Reply from Pila.
Dear Mr. Domingo,

Your email was brought to my immediate attention. We strongly recommend you NOT to use Pila Li-ion batteries in flashlights not specifically approved by us. Pila 168A and 150A are to be used with all Pila flashlights. Whereas, Pila 168S and 150S are designed for SF P6 and P9.

The N62 might well draw too much current and so "overwork" the batteries; a process which might not only damage the batteries but might well be dangerous!

For your perusal, please find the specifications of the batteries attached; you will find the relevant information also on our website: www.pilatorch.com

Please make sure that you are using any Pila accessory for its intended use. We want happy customers and not ones with burned fingers!

In this spirit, I wish you Happy Easter Holidays and remain,

Yours truly,

Urs Baeumle
Managing Director

Cc. ESA, Pila Distribution Centre USA

 

[darkgear.com]

Re: How much heat can Pila\'s handle?

Heh, Since when have we used flashlight things for their intended purpose /ubbthreads/images/graemlins/smile.gif

So I guess the question remains to be answered...

 

[JonSidneyB]

Re: How much heat can Pila\'s handle?

hmmmm, I have been bad....been using in a 12zm

 

[udaman]

Re: How much heat can Pila\'s handle?

JSB, your post reminds me of that scene from Casablanca, where Louis says something like "I'm shocked, shocked to see that gambling has been going on behind my back"...said to the German officer standing next to him. Then a moment later, the manager says to Louis..."your winnings Sir", to which he says "Thank You" /ubbthreads/images/graemlins/smile.gif

Ah, darkgear, you send a question to a distributor in the good 'ol USA, the most litigious society in the world? What did you expect. RC people hammer these Li-Ion & Li-poly's to death, some nice picts over on the RC forums of meltdowns/fires and what not /ubbthreads/images/graemlins/smile.gif. It will be nice if Simon's company ever delivers on those rumored safer 18650 Li-Phosphate batteries. But as you'll read over there, any battery can be abused. Take for example, my bad, in my yut; for whatever brain-dead lack of concentration, I managed to connect the jumper cables backwards when I was trying jump start my car in the college days. A few whooshing? seconds later, Boooom! (*note*, kids don't try this at home, it's VERY dangerous).

I have had this heat issue in mind for various mods. Lots of current, means lots of heat generation. Now depending on how much internal resistance there is, you'll get more heat build up with whatever battery you're for repective higher resistances. This is why I look to higher voltage/less amp draw bulbs in trying to see what I can extract as maximum performance. Lots of lumens is nice, but won't be very useful if the body gets too hot to hold(those with 8D extended Mags excluded ;-)) Heck with 240-volts(not that you get this from anything other than a connected AC power supply), amp draw would be so minimal as to create little heat at all. I'm wondering how much extra resistance the protective circuits in the Pila contribute? And if you run too much current through the protective circuits, will this damage them, greatly reducing the number of charges you can get on these expensive batteries?

Ask a question like that of a USA distributor, what do you expect? Heck, I used to send e-mails to SF & SL in the late '90's about why the hell they did not use higher capacity NiMH batteries instead of NiCad, because I wanted longer runtimes. They respond like you'd expect- "we don't support the use of NiMH batteries in our flashlights". Maybe we could get some better answers from the Chinese manufacturer for Wolf-Eyes/Copia. Are there any CPF's in free wheeling HK, that could pose these questions in Chinese to them? BTW, the Pila site is useless for my browser in trying to find those spec's:

"Not Found
The requested URL was not found on this server.


Apache Server at pilatorch.com "