ITP flashlights are very popular for the features, size, and price. All but one of the lights I carry are single battery lights that include AA, AAA, and CR123 batteries. They also use a twisty interface which is a very reliable mechanism.
The most popular by far is the ITP A3 EOS.
The A3 EOS is a very small AAA twisty light that has a low low (2 lm/50hrs), good medium (20 lm/4hrs), and bright high (80 lm/55min.). It comes in black and natural hard anodized, red, blue, purple, and yellow, as well as stainless steel and titanium. A clip and key chain attachment are included as are two spare o-rings. Dimensions are 14mm (9/16″) x 66.5mm (2 5/8″).
Stainless Steel: $29.95
ITP A2 EOS AA light
This light is very similar to the A3 but uses a AA battery instead. The other difference is that it starts in low first instead of medium, which I prefer. It is available in black or stainless steel. Specs. for the black: low 1.5 lm (60 Hrs) – medium 18 lm (7 Hrs) – high 80 lm (2 Hrs). Specs. for the stainless steel, which uses a CREE XP-E R2 instead of the Q5 led: low 1.6 lm (60 Hrs) – medium 19 lm (7 Hrs) – high 85 lm (2 Hrs).
I currently do not have the ITP A2 flashlight in stock and will not be getting any more in for quite sometime.
ITP A1 EOS CR123 light
This light is very similar to the A2 &A3 but uses a Cr123 battery, commonly known as a photo lithium. This light, like the A2, starts in low first instead of medium, which I prefer. As you can see, output, on high, and runtime, on low, is a lot more because of the higer voltage battery and the bin led on the stainless steel, (R2 vs. the Q5). It is available in black or stainless steel. Black specs: low 1.8 lm (150 hrs) — medium 35 lm (8 hrs) – high 190 lm (1.6 hrs). Stainless steel specs: low 1.9 lm (150 hrs) — medium 37 lm (8 hrs) – high 203 lm (1.6 hrs).
Stainless Steel: $32.95
ITP A6 Polestar
The ITP A6 Polestar uses Cree’s MC-E quad-die led. This emitter puts out up to 700 lumens. OTF, out-the-front, lumens are around 450. This is a very bright light but with a shallow reflector this light is very floody with short to moderate throw. Modes are cycled by holding down the switch. The A6 uses 6 AA batteries, either alkaline or rechargeable. It comes with a holster and extra o-rings.
I also currently do not have the ITP A6 Polestar flashlight in stock and will not be getting any more in for quite sometime.