Hi Policetacteam and bpbauer7,
There are rechargeable 123 size cells out there, but they should not be considered direct replacements for CR123s in any case. It's important that you look at each application individually and determine a rechargeable option that will fulfill your needs and not destroy your flashlight. As it stands currently, there are at least about a half dozen or more variations of rechargeable 123 size cells on the market, some are different chemistries, some protected, some unprotected, some are safe chemistry, some require greater attention to safety details, some have better capacity while others aren't so good, and all of them have different operating voltages than a regular CR123 by either a little or a LOT, so it's important to weigh all of your options before pulling the trigger on some cheap garbage from eBay that claims to be a direct replacement for CR123s.
There are 2 links at the top of my sig-line, It would not be a bad idea to read through those to get a feel for where you are headed.
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Policetacteam,
I see a long list of links in your sig-line there, and it looks like primarily lights that have been configured with LED drop-ins, and in most of those cases, you can just go straight to AW brand protected 3.7V RCR123s without a problem, but do some research to make sure. I see you have MalkOff M60s and the SureFire P60L there, which are both compatible with up to 9V input, so a pair of 3.7V cells is fine there. Your TK10 is also perfectly compatible with a pair of protected 3.7V RCR123s from AW, so overall you are in pretty good shape to convert to rechargeable cells... There is one consideration however... I personally am not sure if I would want a protected cell on a weapon-light. The protection circuit on these cells tends to be the weak point, and I would fear that recoil could damage the PCBs (protection circuits), in this case, I might suggest considering a pair of AWs new LiMn chemistry RCR123s, which are sold as IMR16340s. These are safe chemistry so do not require a protection circuit, but you will need to actively keep track of your usage so as not to accidentally over-discharge the cells, which would hurt their cycle life and capacity. Keep in mind that in most flashlights, runtime on 2xRCR123 cells is about half what it would be on a pair of CR123 primary cells.
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bpbauer7,
A standard C2 with a P60 or P61 does not have any direct rechargeable cell option that will work with those lamps. You will need to look at alternative lamp options to convert to rechargeable cells to match the voltage to the lamp properly. You'll need to weigh your options as far as how much output and runtime you want. This would also be the best time to consider whether you want to convert to an LED module. Personally, I would suggest a single protected 17670 cell from AW driving a "3.7V" LED module. LumensFactory and DereeLight have some great options for this. The modern Q5 and R2 emitters in these modules will blow the P60 out of the water while having over an hour of runtime on a 17670. Only problem with this conversion is it would not be backwards compatible with CR123s, there are some alternative setups that would be.... Let me know what direction you want to go and what compatibility options you want and I'll try to lead you in the right direction
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Eric
