CR123 A batteries?

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gorann
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CR123 A batteries?

Well, Im again discovering what newbie I am Big Smile

Soon I'll get this http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=270748980459&ssPageNa... light

It can use 2XAA or 1XCR123A batteries.

Well, I have at least three solutions

2Xaa alkalines (I wont use that) 

2Xaa 2200mAh NiMh batteries

2 X14500 Liions (800mAh)

-------

And now totally unknown teritory for me:

1X CR123A LIthium (Li-ion??), CR123A is also 16340??

Should I bother with these CR123A at all? Can Liion charger charge Lhitium batteries?

On what batteries light would be brightest, and on which it will last longer?  

Im "little" lost in all these numbers and possibilities. Can someone try to explain at least some of these issues? Smile Not the mention thatI want to understand their votages in relation to battery and alll that in relationwith their capacity, but Im "somewhat" far from that understanding Smile (total ignorant for electricity Shocked )

Edited by: gorann on 07/26/2011 - 21:24
gcbryan
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CR123 are lithium (not lithium-ion) primary batteries...not rechargeable.

14500 are lithium-ion rechargeable batteries in the same form factor as AA

Cr123 is a shorter and fatter battery.

Many times a light will either use (1) 18650 lithium-ion rechargeable or (2) CR123 lithium primaries.

Lithium-ion rechargeable batteries are nominally 4.2 V and around 3.7 underload.

CR123 are 3 V. There is a rechargeable version RCR123 that are 3.6 V.

AA's are 1.5V

No, you can't use (2) 14500's.

Both (2)AA's and (1) Cr123 would be 3V. Runtime would be longer with (2) AA's but performance might be better with the CR123.

This light won't be 300 lumens regardless of what the ad says with a XR-E Q5.

vawayne
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gorann wrote:

Well, Im again discovering what newbie I am Big Smile

Soon I'll get this http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=270748980459&ssPageNa... light

It can use 2XAA or 1XCR123A batteries.

Well, I have at least three solutions

2Xaa alkalines (I wont use that) 

2Xaa 2200mAh NiMh batteries

2 X14500 Liions (00mAh)

-------

And now totally unknown teritory for me:

1X CR123A LIthium (Li-ion??), CR123A is also 14650??

Should I bother with these CR123A at all? Can Liion charger charge Lhitium batteries?

On what batteries light would be brightest, and on which it will last longer?  

Im "little" lost in all these numbers and possibilities. Can someone try to explain at least some of these issues? Smile Not the mention thatI want to understand their votages in relation to battery and alll that in relationwith their capacity, but Im "somewhat" far from that understanding Smile (total ignorant for electricity Shocked )

 

I have this light its not worth it will take 2 AA with ext tube or one cr123a without ext tube

gcbryan
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If it says the working voltage is 4.2V then you should be able to use RCR123 which is 16340.

vawayne
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I still new about these lights...Duo you know current draw maybe, how many amps it draws? And how it's beam look like

the beam looks ok but it is not 300lm like it says if you want a nice cheap light I have this light mounted to

my shotgun and it kicks........http://www.dealextreme.com/p/aurora-x-06-3-cree-p4-wc-120-lumen-led-flas...

gcbryan
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gorann wrote:

@gcbryan - yeah I know but I dont understand how can it work at 4,2V. Maybe you mean up to 4,2V?

 

Because 2XAA is 2,4 V

And cr123A is 3,0V or 3,6V (Li-ion) - 4,2V max?

So I could use CR123 rechargable or 16340.

But not 2X 16340 because that would be 8,4 V?? 

Uf 

It means the driver can handle up to 4.2V so everything you have written above is correct. Well, actually (2) AA alkaline is 3.V and nimh is generally close to that right out of the charger.

df2dot
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i think you may find better quality lights at DX or MF bit harder to navigate but seem to be good price and good service

just go under the AA/14500 section

good  AA light is handy i like

SmallSun ZY-C41 Cree Q3-WC 3-Mode 130-Lumen LED Flashlight (1*AA/1*14500) i have a couple of this brand , i think its good

TANK007 TK-568 Cree P4-WC 110-Lumen LED Flashlight with Strap (1*AA/2*AA/1*14500)course there are a ton more and lots of ppl like these Tanks

 

if you give more criteria , modes , uses etc we can help better- if you not set on AA id go for 18650s

 

 

 


gcbryan
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You can't really say which will be brighter because it depends on the driver. If the light is designed to accept for instance both (1)18650 or (2) CR123 then neither will be brighter than the other.

Regarding what will last longer or run longer that's just a matter of knowing the capacity of the battery and converting the numbers to watt hours.

1 AA alkaline is 1.5V and 2Ah so 3 Wh Two AA's would be 6Wh.

1 CR123 is 3V and capacity is 900mA (I think) so 2.7Wh

Runtime is longer with the 2 AA's. I don't know if it would be brighter on one or the other. Probably not.

agenthex
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It's basically a copy of the Romisen N3. Just get that instead from ledshoppe, it'll be much better.

Reading this makes you smarter: http://lesswrong.com/