Wellp, it was just a convoluted process to begin with, and I just figured Simon’s a one-man band doing pretty much everything solo, so just I’d rather he have it than go through all the contortions for a few bux.
Plus, when I just asked if he had any S2+ pills for sale because they weren’t listed on his store, he threw in a few for free.
Yep, those UV lights will attract damned near anything…
I recieved my Convoy M21B yesterday, I think it’s a very nice upgrade of one of my favorite Convoy flashlights the M1.
I like the new Convoy drivers, but I why do they have mode memory ?. I would prefer no mode memory or at least option to toggle it on or off.
You are way overthinking this. Just choose wire transfer or literally anything that will allow you to complete it. When you go to your orders and finally pay it will prompt you with the options again (you aren’t stuck using wire transfer).
Wellp, what you call upgrade can also be considered a pocketable downgrade. Barefooted I'm just 5' 5" and the M1 has around the maximum size I am willing to carry in my trousers' front pockets. O:)
Convoy M21A
It does have the ideal beam width for me. The brightness is almost good.
However. Is it possible, that if the INR18650 3600mAh 10A (Yellow) Vapcell battery is around 3.5V without load, then the High and the Turbo mode practically have the same brightness? I used it on a bike as a high beam, so it was cold. So cold actually, that I could even touch the inside of the flashlight.
Is there any other flashlight with the same beam parameters, but better cooling anyway? Maybe, with electronic switch? It would be also insane, if I could connect two to each other. I think about something what you can do with the S2 drivers: remove the Attiny 13 from one of them, and wire the controller output of the other Attiny to where the removed controllers output were. I haven’t tried it, but based on how this chip works, it should be possible 
Assuming the Vapcell cell is a Samsung 36G , according to HKJ’s data, at the point where voltage under minimum load reaches 3.5V, the voltage under 2-3A load is 3.30-3.35V, add 0.1 or 0.2V voltage loss from the flashlight body and circuits and the voltage becomes insufficient to support the highest modes. As it doesn’t use PWM, each mode should keep its current constant until it loses regulation, then the current will be the one from the Vf curve for the voltage after losses. If the voltage is only enough, for example, for 1.5A then both 30% and 100% modes will be 1.5A. The modes are not a % of the max mode as in 7135s PWM drivers.
Well, I can’t tell if these are the same.
I hope it will perform better with 21700 batteries
Concerning “the High and the Turbo mode practically have the same brightness” from RelakS, it happens the same with the H1-A driver from CDM between mid and high modes (actual mode stepping: ≈0.4% - 10% - 33.3̅% - 100%). It sort of serves as a low battery indicator.
My Convoy L4 does that - high mode slowly drops as the cells deplete, until it’s the same as medium mode. Just the way that type of driver works. I normally use it on medium, so it’s fine for me.
I rarely (if ever) fully charge my cells, so that Convoy driver behaviour is not really of my liking. The H1-A only lessens its high mode when cell voltage is really low (as described in Jensen567's Buck and Boost Drivers, Testing, Modding, and Discussion). 
Does Simon offer Convoy S2+ with TIR optic mounted by him?
So, if I put some driver between the flashlight and the batteries, which can provide constant 4.1-ish V, this behaviour disappears 
I am thinking in some buck converter of course. The problem is the about 6A current 
Simon when will be available xhp35 driver with tact switch?
Not have side (tactile) switch
Do you mean e-switch?
Or e-switch
My Convoy S12 and M21B from Banggood arrived yesterday. Both of them worked well with 18650 battery size.
Only S12’s tube can fit with 27100 battery, M21B’s tube is smaller 27100 size!
Does anyone have same problem?
I attached here some pictures:
My M21B works with Samsung 40Ts, an Aspire 21700, and a protected, button-top Wuben 21700 that measures ~21.5mm.
What cells are you trying to use?
I think he is trying to use some very fat cells… Glad you were able to press it into S12 :partying_face:
Uch sorry, I just have to :person_facepalming:
E.g Liitokala Lii-40A won’t fit.
I think it would be able to fit it without this plastic yellow wrapping, but I just can’t unwrap it…this yellow looks so nice.
Same problem with Jetbeam PC20, won’t fit this Lii-40A
And Simon said it will be fixed in next batch and will fit all 21700 cells like S12 (if I remember correctly)