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Pros: + Not a bad price+ It can replace all 2*CR123A configurations, though voltage will be lower+ It can be used in all the flashlights that take 2*CR123A (I think I've said that before...)
Cons: - As usual in Ultrafire products the capacity is overrated but still good enough- Not protected so keep an eye on lower voltage
Other Thoughts: As a previous reviewer said if you use it in Fenix P3D you will miss the turbo mode (the voltage is too low) but there is a lot of other models without that feature that can be powered by it.
Bottomline: It is a very good substitute for 2*CR123A, affordable and good quality battery. If you need it just buy it.
Pros: + fair quality: wrapping fitts tightly, dimensions exactly 17mm in diameter and 67mm long as specified + surely overrated (like most UltraFire batteries), but capacity seems acceptable to me + might replace 2 CR123As (if voltage is supported by driver, etc.) + fits my Fenix P3D Q5
Cons: - not protected, take care of not overly charging/discharging it - for roughly the same price per piece, you get a 2-pack of protected 17670s (but I don't know about their measurements) (sku 3301)
Other Thoughts: Using this battery in my Fenix P3D Q5, Turbo mode is not available. Other modes are available down to ~3.2V. So I guess >90% of the battery's capacity can be used in the P3D.
Bottomline: Buy this battery, if you just need one 17670, or if you're not sure if the 2-pack protected 17670s will fit your application.
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