P91 question

[Waspy]

I have a Surefire 9P currently using 2xAW 17500 rechargeable 3.7v batteries.

Would it be possible to use a Surefire P91 lamp with these batteries or would I need CR123s?

Thanks in advance.

 

[etherealshade]

You should be fine using the two 17500 batteries; their combined voltage when fresh will only be 8.4 volts, versus the 9 volts of fresh CR123s.

 

[nfetterly]

yep - I use 2 IMR 16340s in a 6P - BRIGHT

 

[Roger999]

You should be fine using the two 17500 batteries; their combined voltage when fresh will only be 8.4 volts, versus the 9 volts of fresh CR123s.

With voltage sag the 3 CR123 primaries will drop to around 2.4V each, and the p91 pulls over the 2C safe discharge rate of the AW 17500 LiCo cells.

EDIT: Read http://www.candlepowerforums.com/vb/showthread.php?t=281175

 

[Waspy]

OK thanks.

How about one of these? OK for a 9P? batteries as above?

ThruNite P60 Style Cree XP-G R5 LED Drop In Flashlight Upgrade Engine - SINGLE STAGE
300 Lumens (1A Drive Current)
2.7-9V input voltage
Cree XP-G R5 LED
Outer spring is removable for some fitments
Aluminium textured/OP reflector with bronze heatsink base
Bezel diameter: 26.5mm
Copper base diameter: 19mm
Height including support spring: 36.7mm
Height excluding support spring: 28.8mm

 

[Linger]

Any p60 / d26 drop-in will do. you could do that one you posted but there's lots more options, specifically, you could get something with a tint you liked which may give your drop-in a lot more usefulness to you.
(for example, the cree 5B bin is great for me, such as the xpg R4 5B)

re: p91 - if you went to 2x AW IMR cells you'd be in the clear. Or use a lamp assembly with a longer run-time/less output to reduce the strain on the cells, then you could use your AW lico cells in spec.