If you speak about Convoy L2 yes.
For X3 extension tube do not exist. I saw in this forum someone was made from stainless steel tube for 3 x D size.
If the driver is LD29 best performance for X3 is when it works with 2 containers with 3xAA. Ni-Mh can not give high current so better to use high voltage. But I think X3 use LD25 driver which is for single cell li-ion battery.
Here is Convoy L2 with 3 x C battery. In same tube fits 4 x C without dummy cell, but in 4 x C L2 works only in high mode.
I love convoy for quality and price. I’m more of functionality over looks kinda guy. Now you know I dress 
But I really like the black matte finish and grip of the flashlights.
But have something on my wishlist
I would like to charge my phone with the flashlight. (powerbank function)
The USB charger on de BD04 is great but I want it integrated into the light. Not a click on thingy that gets lost or forgotten.
More 32650 flashlights. The BD04 is great but a little more power would be great. Tip: buy an Anker 5000mAh powerbank for $10 and take the great cell out.
How about upgrading the XM-L2 U2 to U3 or even U4? The 13% efficiency boost would be great.
About an AA Convoy:
The li-ion Convoys are well made and very affordable but their drivers are not special (although the newest Convoys have nice Toykeeper firmware , the hardware is the basic 105C). But that is no problem because li-ion drivers do not need to have a complicated hardware design to work well.
In contrast, an AA Convoy that would be as attractive as the li-ion ones does need a new driver that is not as freely around as the common Nanjg 105C. Making an efficient boost driver, or have one made, would be a new step for Simon. I certainly wish that he would go that way though
Are we just listing what we’d like Convoy to make next?
I’d like a small, single 26650 xhp70 light with built in usb recharging.
Something like the Imalent DN70, Olight R50 Pro, Klarus G20 or Acebeam EC 50 gen 2. But, you know, not sucky or overpriced.
Again, this requires a new type of driver for Convoy (boost), which may be out of Simon’s comfort zone.
Yes, I know.
But, 1 each of the 4 lights above (plus Thrunite TM03) could be bought and the driver designs studied carefully to create a unique “clone” driver. Ha ha, you know the Chinese companies are famous for that. Lol
EDIT: Here is a possible boost driver that may be for sale soon.
i would like a flooder, like quad hexa core Nichia 229 and 18650, with tail cap
manker e14 was a good light, but not its head
I’d buy a 3xAA battery tube for an S2+. In fact, I’d buy several of them. Nothing fancy, just three AA cells placed nose to tail.
I know the light would be 20cm / 8” long, but I’m not bothered by that, because I like long lights anyway, and it would be a great emergency fallback for my usual 18650 setup.
3xNiMH would work fine with the existing Convoy driver (4.5V hot off the charger), although I’m less confident about lithium primaries (5.4V new).
Those might be problematic for the 7135 chips, since they’d be dropping more voltage than recommended. The 7135s would still be safely under their 6V maximum, but they’d heat up more than usual, perhaps to the point where their thermal limiting would engage.
Alkalines would just collapse in voltage at any significant load, of course
The microcontroller would be fine, because it has a reverse-polarity protection diode in series with it, which would knock a little forward voltage off and keep it away from its 5.5V rated operating maximum.
It occurs to me that a 3xAA tube might be a good way to get S2+ lights into the hands of non-flashaholics who don’t want “weird batteries” - or can’t be trusted with them, for that matter - without having to build a boost driver. Not a pocket / belt EDC any more, of course, but fine for a household / car / backpack light.
+10, there are too many crappy AA lights and convoy could change that. :+1:
AA, C and D cell sized flashlights are a dead end
quality Lithium cells with PCB and a dedicated muggle mode 18650 Charger is as safe as your smartphone
Using a DTP star the flashlight can get to about 80°C with LED at its rated current, within safe junction temperature
you cant touch it without burning yourself at that point
Another thing I’d like to see would be a USB powerbank head for the S2+. Unscrew the LED head, screw on the powerbank head, and you can charge your flashlight cell back up or use it to charge your phone.
I’d plump for 1A input to charge an 18650, with 2.5A output for a USB device. That should work with any decent 18650 from the NCR18650B on up. Think of it as a Thrunite C2 done right.
Taking the reflector out of the S2+ head and replacing the lens with a flat cover plate should leave plenty of space. If I had the skills and resources to design and build a couple of boards in 16 or 17mm size, one for a TP4056 charger and one for a 3.7V to 5V USB booster circuit, I’d be doing it right now
I disagree. You can’t put a smart phone battery in your pocket with coins and keys! You generally can’t buy li-ion batteries in supermarkets. AAA and AA lights have an excellent future due to the popularity of these batteries with the general public and high perceived safety.
You ever saw someone freaking out in the 90s when his spare walkman batteries in his jeans pocket got short circuit by his keys?
Most primaries and consumer batteries can’t be put with metal parts in a pocket safely
Batteries need to be stored properly
A battery in a smartphone is as safe as life is, or would you refuse to use any device with a battery
Your TV or any other electronics can catch fire if they fail badly and you get harmed
There are every day people win in lottery, but accidends with consumer lithium batteries are rare
A 18650 with PCB is a consumer battery and can be considered as safe as life is
I don’t think AA lights are a dead end either.
C and D maybe, well… probably (for flashlights anyway), but AAA and AA are here to stay for quite a while.
AA is a good mix between small size and decent capacity.
I like my AA lights a lot. (but i use 14500 in them…)
I’m not convinced there’s much life left in AA & AAA (14500’s etc, yes.) Everyone I know owns a battery pack that is (at the root of it) powered by 18650’s or similar. Yes, you can buy AA’s in the shop - but you can recharge said powerpacks in your car. I now leave a Lii-202 in my centre console for convenience as most of the lights I own don’t have microUSB recharging - if they did (and more and more are going that way) then I wouldn’t need to bother with that, knowing that I can recharge all the electronic devices I carry with me a) at home b) at work c) in the car d) just about any place I go…and for the places I can’t go, I (like many muggles) have several battery packs that I can take with me. But that’s rare when even shopping centres will offer free recharging lockers.
I know more people with a li-ion battery pack than I do that carry a flashlight routinely - the vast majority of them are using their smartphone as a light when they get caught out. So I think the days of buying disposable AAA’s/AA’s are numbered.
Alkaline C and D are basically dead already because they are so heavy. But AA, AAA, and 9v aren’t going anywhere. Probably not even in our lifetime. They are so darn cheap and disposable. Everyone loves disposable. TV remote dead? Trash the batteries and put new ones in. No chargers to buy, no wait time. It’s sad, people say they care about the environment, but in practice they only care about cost and convenience. Alkaline wins both.
honestly, why people keep sticking with aa,aaa, d, we should all change to li-ion, much higher energy density, longer life time
we should Add micro usb charging to everything
But let’s not forget NiMH either.
It’s a safe and carefree chemistry.
All I really want right now is the beautiful clear anodized S2+ to plop my triple XP-L build into. Then I gotta plan something else for the tan coloured one. The more metal switched lights the better.
I like the powerbank idea because I suggested it myself
I don’t like a separate head. I had separate parts (powerbank head, USB charging cap). More stuff is more stuff to forget. Then I prefer slightly longer flashlight.