Whats the best rechargeable option for E2L/L4 body?

KDOG3 · Dec 28, 2006

I'm thinking the 17670, correct? I'm considering getting the DSD charger and at least one of the 17670s' from lighthound. But I also have 2 of the batterstation 3.6v 900mah protected RCR123s. Can I use them in a E2L? I have a McR20 based KL1-R I'm running.

GarageBoy · Dec 28, 2006

The KL1 can take upto 9 or 12V, IIRC (me and luxlover did 4 CR123s)

KDOG3 · Dec 29, 2006

Yeah, when the E2e body I ordered gets here, I will probably try out my 2 RCR123s... I wonder what the runtime will be...

GarageBoy · Dec 30, 2006

LOOOONG. It only draws 4-600mA (can't remember the exact numbers)

Resq47 · Dec 30, 2006

I have some of the 17670's and some RCR123 750mah's. Both work fine for E2e + KL1 use or 6P + KL3. I gave up trying to get the runtime, it was well into the several hours range

KDOG3 · Dec 30, 2006

Hmmm, maybe tomorrow I'll charge up my 900mah 3.6v RCRs and give it a try. I'm considering getting a 17670 + charger for it.

Delta447 · Dec 31, 2006

You really don't need the 17670 battery unless you are going to be running the L4 head. A pair of RCR123 batteries packs more power than a single 17670. I have both sets of batteries and use the 17670 battery for the L4 and the RCR123's for the E2L.

JanCPF · Dec 31, 2006

Delta447 said:
... A pair of RCR123 batteries packs more power than a single 17670....

Delta, I disagree. One 17670 = 1600 mAh, two RCR123 = 1400 mAh (on a good day). We have yet to see confirmed data of an RCR123 with more than 700 mAh AFAIK.

Jan

Delta447 · Dec 31, 2006

Jan, I must admit to being a relative noob on the subject of rechargeables, but I am anxious to learn. From what I've read on the CPF board, you should not run the L4 on a pair of RCR123's. Is that merely due to the voltage output and not due to total power output? Also, if the 17670 puts out more power, does that translate into longer runtime?

JanCPF · Dec 31, 2006

Ah ok

. You are right that one should not run the L4 on two RCR123 3.7 volt cells. This is due to the voltage of 7.4 volts (Actually 8.2 volts right off the charger) with two cells in series. The L4 should be run on one Li-Ion cell like the 17670. It will still run nicely in full regulation. But before you go out and get 17670 cells you should make sure that you haven't got one of the very new L4 bodies that has a smaller inner diameter at the one end of the body. It has recently been discovered that Surefire has made it difficult for new owners of the L4 to run it on Li-Ions.

The KL1 runs happily on voltages ranging from 3-9 volt which means that two RCR123 (3.7 volt) cells are ok with the KL1 .

Yes, the larger capacity of one 17670 (1600 mAh) versus two RCR123 (1400 mAh) does translate into longer runtimes.

Jan

KDOG3 · Dec 31, 2006

Remember Jan, my RCR123s' are 900mah each, that should be 1800mah total, correct?

JanCPF · Dec 31, 2006

KDOG3, Yes but isn't that just what is printed on the cells? As far as I know nobody has ever measured or otherwise confirmed more than about 700 mAh. If indeed they are 900 mAh that would be very interesting. I have a batterystation 900 mAh but it only yelds the same runtimes as AW's 750 mAh. Now where is Silverfox when you need him

here is Silverfox's battery shootout. Look a little down on the page to find the RCR123 shootout. https://www.candlepowerforums.com/threads/117117
Actually none of the ones he tested is more than about 650 mAh.

Jan

KDOG3 · Dec 31, 2006

Hmm, that graph doesn't state whether its the batterystation 750 or 900man version. They sell both.

JanCPF · Dec 31, 2006

KDOG3 said:
Hmm, that graph doesn't state whether its the batterystation 750 or 900man version. They sell both.

That right KDOG. Hopefully Silverfox will chime in. Do you have some runtimes using your batterystation cell? For instance most of my RCR123 will run a KL1 for about 40-45 min before shut down from protection circuit, and a KL4 for about 20-25 min. in regulation before dimming down to moon mode'.

Jan

KDOG3 · Dec 31, 2006

Nah, I don't have runtimes. I got them charging right now, when the primaries that I have in my E2L die I'll load em' up and see how it goes....

john2551 · Aug 31, 2007

JanCPF said:
Ah ok . You are right that one should not run the L4 on two RCR123 3.7 volt cells. This is due to the voltage of 7.4 volts (Actually 8.2 volts right off the charger) with two cells in series. The L4 should be run on one Li-Ion cell like the 17670. It will still run nicely in full regulation. But before you go out and get 17670 cells you should make sure that you haven't got one of the very new L4 bodies that has a smaller inner diameter at the one end of the body. It has recently been discovered that Surefire has made it difficult for new owners of the L4 to run it on Li-Ions.

The KL1 runs happily on voltages ranging from 3-9 volt which means that two RCR123 (3.7 volt) cells are ok with the KL1 .

Yes, the larger capacity of one 17670 (1600 mAh) versus two RCR123 (1400 mAh) does translate into longer runtimes.

Jan

What date did the change in L4 smaller bodies occur? Is there a serial number cut-off?

Long John · Aug 31, 2007

The math for calculating the total capacity of cells looks like this:

2xLIR 123:

3,7V x 0,7 Ah = 2,59Wh x 2cells = 5,18 Wh

1xLIR 17670:

3,7V x 1,6 Ah = 5,92 Wh

So indeed the 17670 has a higher capacity.
But the capacity depends also on the discharging rate that means, the higher the consumption of the load, the less the total capacity of the cell.

The printed capacity declarations are often extraggerated by the manufacturers.
In reality, they will increase in the future by development, but the house numbers nowadays are in the region of the "AW"-cells.

Best regards

____
Tom

Aepoc · Aug 31, 2007

I just got a Lumens Factory Extreme Output Lamp Assembly for my SF E2D. This essentially doubled the output and allowed me to put some of AW's black RCR123's in it. Its like I have a brand new light.I'm really happy with the outcome.

Whats the best rechargeable option for E2L/L4 body?

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