Here’s my review of the Dinodirect giveaway light:
It even comes with a yellow warning sticker 
:
Size compared with other AA/14500 zoomies:
It’s a bit longer than a Sipik SK68 clone, but lighter - ~56g versus ~62g. It also feels better in the hand and has a nice color. The king in the size and weight department is the silver zoomie (~32g!).
In peaces:
Crappy photo of the business end:
Hollow pill, as usual:
Driver (14mm):
High > Low > Strobe, next mode memory 
Fortunately pencil modding helps making memory only last for less than a second. This way a quick half press still advances the modes, but a slightly longer one (or a full on-off cycle) defaults it back to high. Goodbye accidental blinky modes!
The overall build quality is pretty good for the price. Only the tailcap has some sharp-ish edges (comparable with SK68’s crenelated bezel). The clip is weak. But this light comes with 4 o-rings, something the other two can’t brag about. Here’s an example:
And after aplying some silicon grease on all the threads and o-rings you can feel the air resistance when zooming the head in and out. That’s an indicator this zoomie might actually be waterproof.
Another thing I liked - this light has the widest flood beam of all three. It’s as wide as a Zeusray! And it’s bright.
Current draw with a freshly charged Keeppower 840mAh 14500:
High: starts at ~1.5A
Low: ~0.35A
Overall, I like this light. It looks and feels better than a SK68 type light, has a very wide flood beam and all the o-rings included. Is it better than my Sipik SK68 clone? I think it is.
EDIT: Coupon code to bring it down to $4.99: BLFHM