jerry i h
Enlightened
Skipping to the end: I am truly impressed, and recommend it.
For the past couple of years, I had an LD01 (Q5) EDC on my keychain. I have just received the A3 (XP-G R5) as the intended replacement. Sadly, I do not have access to basic tools: ruler, scale, or camera; sorry about that.
It comes with 2 extra O-rings, pocket clip, lobster claw keychain, and is packaged in small, metal tin that looks like it has mints inside, but1 x AAA not included. It is, maybe, ten bucks more than the LD01.
LOOKING GOOD
the A3 is slightly shorter and a tad heavier. It has a high polish, so it can easily be mistaken for SS or chrome, although the color is slightly darker. The LD01 has gouges, scratches, and nicks; how long the A3 will retain its shiny, mirror finish, we shall see. Unlike the LD01, the A3 does not tailstand since that is where the keychain is connected. Both the head and body are knurled slightly.
LET THERE BE LIGHT
Putting fresh batteries in both, I did some white wall hunting. Despite the dramatic difference in LED's, the beams were remarkably similar. The shape and intensity were nearly identical, close enough to call it a draw. The R5 had a cool, bluish tint, while the Q5 had a warm, yellowish tint; I prefer the color of the Q5.
MODES
Here, the A3 won hands down. The first mode is a fauxton-like 2 lumens low mode, quite useful and very nice; the LD01 low is not that low. The PWM of the LD01 is quite noticeable and annoying to the point that I never use the med or low modes. The A3 has a high enough frequency to be not noticeable; hallelujah.
FINAL WORD
I had trouble finding the A3 (in fact, I found it kinda by accident), so I think it might be discontinued. I am quite impressed, and give it highest recommendation: buy it if you ever see it for sale.