Energizer A93-8 1.5v really make 7935 mAh?

[bigchelis]

I apologize in advance if it is a silly question.
Energizer A93-8 1.5v really make 7935 mAh?

I saw here I can get the 3C cell tube to fit Surefire with Omega's tube.
$urefire C head, "C" cell Body, Clickie Tail Switch

If so, I could use this to run a P7 drop-in from Malkoff for really long run times. Since the P7's are direct drive and Gene said it works best in a single 18650 setup then 3 of these "c" batteries would make almost 24k mAh right and about 4.5v?

Gene mentioned it will draw a little over 2.5A.

With 3 over the counter readilly available Energizer C batteries what can I expect as a runtime with the P7?


What about the M30?

Note: I currently use the M30 in a 6P bored and the P7 was going to take its place, but it seems this may be a better set-up for weekend camping trips when the extra size of the flashlight is no big deal.

Thank you for reading and the help.

 

[paulr]

If a93-8 is something like an alkaline C cell (like E93), then yes, 8000 mah or so is reasonable, but only at very low discharge rates, like a few mA (think of a clock or radio, not a flashlight). It is drastically lower at high rates.

 

[metlarules]

Below is the data sheet from Energizer's website. Take a look at the mah discharge chart. At 500mah it is below 4000mah already. Driving a P7 at max current would drain this cell pretty quick. http://data.energizer.com/PDFs/E93.pdf
Also, if you put 3 in a 3c it will be in series.The current stays the same in series,and the voltage is added together.

 

[Mr Happy]

It's just a C size alkaline battery? 8000 mAh seems reasonable for that. Maybe a touch on the high side, but reasonable.

However, if you use three of them to make 4.5 V it will still only be 8000 mAh, not 24000. You are already trebling the voltage, you can't treble the mAh as well. That would be double accounting.

Also, this battery seems to be for low drain devices. It is not likely to perform very well if you try to draw 2.5 A from it. The high capacity of alkaline cells only holds with low power applications. With high power uses the capacity is much reduced.

 

[bigchelis]

If a93-8 is something like an alkaline C cell (like E93), then yes, 8000 mah or so is reasonable, but only at very low discharge rates, like a few mA (think of a clock or radio, not a flashlight). It is drastically lower at high rates.

Thanks, I was thinking if it could handle the draw rate it would be perfect. I know lighthound has the 3.7v 3300mAh safe chemistry batteries, but the voltage would be too high for a M30/P7.

What is the discharge reate of the Alkaline C cell?

 

[mdocod]

why not use NIMH C cells? they are available up to ~6000mAH, 4500mAH in LSD, and will actually deliver those capacities into the load of a P7

 

[bigchelis]

why not use NIMH C cells? they are available up to ~6000mAH, 4500mAH in LSD, and will actually deliver those capacities into the load of a P7

These NIMH C cells can handle the 2.5A to 2.8A draw of the P7?
If so then I think I found what I have been looking for.
Also, where is the best place to get these?
Thanks,
bigchelis

 

[mdocod]

here ya go:
http://thomasdistributing.com/shop/...04_247.html?osCsid=cuou4olhi75kmlshfc5v926ra6

I suggest the "Evolution Low Self Discharge" ones. Buy 3 packs, so you have 6 total, 3 to use and 3 spares :)

I recommend the MAHA 808 as your charger:
http://thomasdistributing.com/shop/...48_260.html?osCsid=cuou4olhi75kmlshfc5v926ra6

 

[Yoda4561]

Nimh's are good for at least 1c, any "true" C cell nimh is over 2800 mah.

 

[bigchelis]

here ya go:
http://thomasdistributing.com/shop/...04_247.html?osCsid=cuou4olhi75kmlshfc5v926ra6

I suggest the "Evolution Low Self Discharge" ones. Buy 3 packs, so you have 6 total, 3 to use and 3 spares :)

I recommend the MAHA 808 as your charger:
http://thomasdistributing.com/shop/...48_260.html?osCsid=cuou4olhi75kmlshfc5v926ra6

I been looking at only a C battery charger to avoid the hefty price tag of that one. Is there some for around $40 dollars?

 

[mdocod]

here's one for $50 that's decent,..

http://thomasdistributing.com/shop/...html?SP_id=&osCsid=sqgipnos1kmgdenlp91pk4a3t6

this one is new to the market and I haven't heard anything about it but based on the specifications I think it might be decent:

http://www.batteryjunction.com/md-3000-charger.html