Rechargable Batteries for Surefire 9P?
- Thread starter KJB32
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kramer5150
Flashaholic
I believe the following will generally fit (YMMV depending on the actual cell dimensions and drop in used):
2xAA (with spacer tube)
2x14500 (with spacer tube)
2x17500
1x17670 + 1x16340 dummy cell
The 9P is dimensioned for 3x16340 cells end to end.
16=diameter in mm
34=length in mm
0=cylinder form factor
So 3x34mm = 102mm. Therefore any cell combination adding up to ~102mm length will fit.
The 6P and 9P are bored to 17mm diameter. So any cell near that diameter will fit.
2xAA (with spacer tube)
2x14500 (with spacer tube)
2x17500
1x17670 + 1x16340 dummy cell
The 9P is dimensioned for 3x16340 cells end to end.
16=diameter in mm
34=length in mm
0=cylinder form factor
So 3x34mm = 102mm. Therefore any cell combination adding up to ~102mm length will fit.
The 6P and 9P are bored to 17mm diameter. So any cell near that diameter will fit.
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Kestrel
Flashaholic
2x17500 LiIon rechargeables will provide the same voltage (2x3.7=7.4v) as the standard 3xCR123 configuration (3x2.5=7.5v). This is the highest rechargeable capacity configuration for an unmodified SureFire 9P.
Hope this helps,
K
Also, notifying a mod to move this to the batteries section...
Hope this helps,
K
Also, notifying a mod to move this to the batteries section...
kramer5150
Flashaholic
That would depend on the R2 drop in you are using.... not all are designed for the same Vin.
It most likely would not increase output, since the Vin for XR-E is only ~3.6V.. and Primaries are equally capable of delivering sufficient current to the XR-E.
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SureAddicted
Enlightened
Kestrel, I always thought a 17500 is 4.2v and a CR123 3v, please correct me if I'm wrong.
KJB32, I have a couple of R2 dropins, they run on 3.7 to 15v, so they can be run on a wide spectrum of cells. I'm not sure if you have the same dropin though.
KJB32, I have a couple of R2 dropins, they run on 3.7 to 15v, so they can be run on a wide spectrum of cells. I'm not sure if you have the same dropin though.
EV_007
Enlightened
If you don't mind the light being a litter longer, the use of the A19 cell extender will allow you to use two 17670 cells which will provide plenty of power and runtime for your P91 LA and other after market lamps.
My favoirte combo for incan, gulit-free setup without too much of a frankenlight look.
My favoirte combo for incan, gulit-free setup without too much of a frankenlight look.
DM51
Flashaholic
Moving this to the Batteries/Electronics section...
kramer5150
Flashaholic
That would be a killer setup... ~400+L OTF
Kestrel
Flashaholic
From what I've read here, it's generally considered that a 4.2v LiIon sags to ~3.7v +-0.1v when under a moderate load. Same thing for a 3.0v (nominal) CR123, 2.5v +-0.1v. I've also read (from SilverFox I think) that a CR123 under a very severe load can sag to as low as 2.2v.
I don't know much about the R2 dropins, but I've read that at 3.7v, they will do only ~140 lumens, to get the rated output I imagine that ~7.5 volts are needed? Just a guess, I'm sure "the truth is out there" (somewhere on CPF). When I think about it I'll try to compare my R2 on 3.7v vs 7.4v sometime...
ElectronGuru
Flashaholic
There are several issues here: size, capacity, and voltage.
RCR123's are the same size as CR123's
RCR123's are 3.7 (4.2) volts vs 3.0 for CR123's
RCR123's can't discharge as far as CR123's, so their effective capacity is less, despite being the same size.
So 3x RCR123's fit fine in a 9P, but in practice, are not as good an option as 2x 17500's (or 2x 18500's with modification). While not as good with incan setups, 2 larger cells work fine with most LED options.
