I've been looking at reviews, reading these posts, but I just can't seem to find the right light. I've found a few that are close, but just not quite right. I recently scaled back my EDC loadout, and thus removed most of the heavier items., including my CR123 light that i carried in a belt holster. I need a small light that can be clipped to my front pocket, along with my knife...this limits me to single AAA/10440 lights. So far, i've started with cheap lights, which could be my problem. I currently own four of these single AAA lights. I started with a Coast G19. It is a well built light. The pocket clip works pretty well, and it has a tail switch, which i prefer over any other type of switch. It is on the large size for this type of light, it is not very bright, and the beam is weird. It is a very focused perfectly circular beam with no hot spot and no flood coverage. I'd like something with more of a broad flood coverage over a spotlight. Next was a Maglite Solitaire LED. The size is great, build quality is great. It is not very bright (45 lumens i think) and i just can't stand the twisty interface. The lack of pocket clip rules it out as well. Next i got a cheap $3 light from China on amazon. This thing actually is pretty nice. The size is great, clip is strong, it has a tail switch, and is relatively bright. (i'd guess around 100 lumens). This is the closest i've found to the perfect light. I just wish it was a little brighter. Most recently, i picked up an Ultratak K18. This was the most expensive of the bunch, coming it at around $20. It is an amazing light. the build quality is excellent. It is IPX8 waterproof. The pocket clip works very well. It came with a USB charger and a 10440 battery. (you unscrew the led portion of the light and screw on the usb charger, not the most convenient, but it works well). It is incredibly bright with a 10440 battery (360 lumens on high, 80 on medium, 5 on low) and decent with a standard AAA (110 on high, 25 on medium, 3 on low). It also has a strobe feature, which i could do without. Personally, I love this light, but the interface is a little clumsy. First of all, it is a side mounted switch, which sucks compared to a tail switch. Also, you have to long press to turn it on and off, with a quick press to toggle modes once it is on. you double click to lock it. If it was a tail switch, it would be the perfect light. then I wouldn't need to lock it. but with the side switch, i have to keep it locked so it doesn't turn on in my pocket. This makes it cumbersome to use, especially if someone else wants to borrow it. What i would really love is a 10440 light with a tail switch. I'd prefer as few modes as possible, something i just just turn on and off would be great, but i could tolerate a hi/low or hi/med/low. I don't need or want a strobe or sos feature, they are completely useless to me. Ive looked a lot of lights the last few days online but just can't seem to find this. I'm tempted to try the 10440 battery from my k18 in my $3 Chinese light and see if it can take it, but I don't want to risk destroying it. The original seller on amazon no longer offers them, but i did find some similar units for $7 with prime shipping, so it may be worth while to order another and just give it a shot with the 10440 battery. any suggestions?