UltraFire C3 2xAA Extension Tube

Pros: Fits perfectly.

Cons: Too narrow for my Duracell NIMH! Simply impossible to insert. Actually the whole flashlight is too narrow! Also it's completely sealed but NIMH gives out gas while in use. After an hour of use, the on/off button rubber is like a balloon. Dangerous!

Other: If you intend to use rechargeable batteries, be sure to check if it will fit. If your battery has a diameter greater than 14.20 mm, don't buy.

Pros: Fits well with UltraFire Cree C3 Flashlight. Comes with a dust/water seal. Allows you to use the light with 3 AA batteries, or more. You can just keep extending if you want more power for some reason.

Cons: none

Other: Does what it ment to, and does it well.

Pros: Greatly extends runtime. Perfect fit. Well built.

Cons: Won't increase brightness (or only very little).

Other: If you bought a C3 with no extension tube, this is -highly- recommended, but expect longer runtime, not higher brightness. Buying it for 3xAA should only be done if you're crazy, like me ;) Or if you occasionally have a need for very long runtime, or if your shop only sells AA in 3 packs :)

Pros: Convert Ultrafire C3 upto 3xAA which makin it really flexible in battery setup

Cons: Make the flashlight longer :)

Other: Does what it says really

Pros: Extends the battery life greatly.

Cons: The battery tube seems a tiny bit thinner than the battery tube of the torch. Some of my ni-mh rechargable batteries got stuck until I removed their labels.

Other: I wouldn't buy an UltraFire C3 without buying the extension tube, it's that useful.

Pros: Very nice, just a piece of aluminum which allows the light to hold one extra battery.

Cons: Only came with 1 washer.

Other: It brightens the flashlight a little, buy if you use AAs.

Pros: Gives extra AA capacity, easy to use.

Cons: Can be too narrow for some rechargeables.

Other: If you have a Ultrafire C3 without this, buy one!

Pros: Gives something like 4 hours runtime from 2 AA rechargeables. Still quite small for a 2AA light.

Cons: Threaded portion at tailcap end not long enough, the extension doesn't screw in enough to make contact with the tailcap. A small loop of copper wire will fix this.

Other: Useful - but I prefer the 1AA size for this light.

Pros: Increases the brightness significantly Larger size makes it easier to hold

Cons: No longer fits in holster

Other: A good addition to an already great flashlight, would be best to buy the pack including the extension and save some money!

Pros: You get an amazing runtime and regulated light with this. Must have if you don't mind the C3 getting longer.

Cons: Need to increase QA, mine has slight mismatch threads and had to pretty much force it near the end. Also the anodizing didn't completely finish on one end. See pic above if it gets posted.

Other: If you have a C3 better gets this!