Review: Convoy M4U [XPL-Hi, micro-USB charge, biscotty, 26650]

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Review: Convoy M4U [XPL-Hi, micro-USB charge, biscotty, 26650]

Convoy experimented a lot in 2019 year. It`s lineup has replenished with 21700 powered models. Now the assortment of the store is wider than ever. You can buy the same well known modeles, or you can take their adaptation for 21700 battery.

M4U combines a lot of features that may attract users – SMO reflector with XPL-Hi,26650, biscotty, finally – charge port. So, lets` take a look at this flashlight.

you can buy it at aliexpress | Banggood
26550 battery for it


Luxury, to Convoy standarts, that is, not just a white wipe, but a real thick beige cardboard box.

Inside – the same set of a flashlight with a lanyard and a pair of 18650-to 21700 conversion rings. Well, as Biscotti is not the most obvious UI, it would be nice to add some simplest print with manual.

Flashlight look pretty good. Design combines downscaled head of bestseller Convoy M3 with knurling taken from 4×18A. Actually, you can immediately evaluate the sizes. Convoy M4U will take no more space than C8 + in your pocket.

Fortunately, this combination does not leave a feeling that in the end we got some kind of Frankenstein. The flashlight, looks simple, but good. This is not Acebeam or Mecarmy (at their best time), but it looks definenely OK. As usual, more like a tool than an stylish thing.

The tail is flat and the flashlight is pretty stable. If you have a diffuser (and it is not difficult to find it at such a diameter) you will get a good nightlight in 0.1% mode.

There is the thick spring that would fit even some kind of XHP70.2 powerful flashlight.

Of course, as any other Convoy, you can fully disassemble this flashligh.

The thread is large, it is normally oiled, there are no complaints about the machining.

Knurling is tenacious. Here, by the way, I have no reason to complain about the rest of the models from the comparative photo.

The spring at the head is significantly thinner than at the tail, will be enough for such power . What is not usual – there are two rings. One without thread pressess driver, and there is 2nd regular one upon it.

Button move is soft, with a noticeable click. As there is a 1mm gap outside of button, so it can skew, see the first photo.

The cover of micro-usb connector is quite thick, it holds well. I do not expect any problems from this side.

Nearby you can see the simplest blue-red LED charge indicator. Charging current is ok, 1A, but might be higher – 2A is way better for 26650.

The head is just a little bit longer than one of mid-range flashlights.

Cooling fins doesnt impresse neither with number nor by depth. But, given the brightness and overall dimensions of the M4U, there is issue with heatsink at all.

The bezel is wide. twists off easily. And the difference of reflectors depths is clearly visible here, it is clear C8+ has really longer reflector.

It makes no sense treat this as disadvantage as there are lots of situations, when you need some light for working at closer range, and M4U should be more convenient here than C8+.

Glass has enlightenment and anti-reflecive coating

At the bottom – copper plate with XPL-Hi, the same as C8+ has.

That, in fact, is all. Everything looks good. I can mention only a large gap at button sides, because of which it can periodically skew when pressed. I have no more complaints.


Biscotti, known for the many past models. I`m not fan of it for it`s mediocre stabilization which outweights (for me) all the convenience of mode presets choice. I’ll get ahead of myself – it’s WAY better here in M4U.

The rest is the same.

How the Convoy M4U shines

As usual, you have choice of different color temperature. I got 5000K.

Look at pic, here is strange thing. Looks like M4Uhas a slightly more focused hoptspot in vs C8 +. When you use them alive, it is opposite. I would say that the difference in reflector size is much larger than the total difference in light, I definitely expected more M4U has throw similar to M21B, closer to mid-range flashlights than to throwers.

And if the difference in light is surprisingly insignificant, then Convoy M4U is so much better Convoy C8\C8+ in stabilization and rutime. With a 26650 battery, you get a full hour of work at maximum brightness. And after two hours, the M4U will still shine at 50%, while the C8 + has long fallen to 20-25%.

Personally, I am 100% satisfied. This is the best stabilization you can squeeze out of Biscotty, as far as I understand the specifics of the driver construct.

And this directly affects the throw. If C8 + is slightly better when battery is fully charged, then after a short time you face stepdown while M4U continues to shine at the same level and became leader. In general, in terms of light distibuution and throw, it reminds me very much of the good olde C8 XML-2.

And for most people, the light of this flashlight is quite enough – you rarely need to illuminate things at distance more than 150-200 meters from you, and it is quite a feasible distance for the Convoy M4U, at which it will work for decent time.

Close range work, of course, it is not very convenient, but from 30-50 meters it is revealed in all its glory.

250m – this is already close to the limit at which there M4U has some practical use

 As usual, there are more visual information in the video review


In terms of light, the model reminded me very much of people`s choice Convoy C8 XML-2. And in terms of size they are quite comparable – difference here is only in the diameter of battery compartment part.

By modern standards, its throw is not impressive at all, but for the vast majority of ordinary needs it is more than enough and you can safely rely on it for work within two, maybe two and a half hundred meters. C8 + will have uncritically long throw. But! Only at full charge, after a short time of 100%, the M4U will break ahead due to significantly better stabilization.

Biscotty driver gives you the opportunity to choose a comfortable group of modes for yourself. At the same time, the Convoy M4U is deprived of the mediocre stabilization of the popular Convoy C8 + with the same driver and will allow it to work almost twice as long without a stepdown.

The cost of 26650 Liiitokala batteries for it will be only symbolically more expensive than the same Liitokala NCR18650B for C8.

M4U now costs about $ 27-28, which is about $ 7-8 more expensive than C8 + and $ 10 more expensive than C8, actually a 1\3. It seems to be a difference. But! The M4U has built-in charging. And it`ll cost you the same to buy any decent external charger.

I personally know a certain number of people who hate taking out batteries and charge them in external charger. As a rule, I hear in different variations a phrase such as “dad\ grandfather \ uncle needs a flashlight, but with built-in charging ”. In this regard, M4U will greatly simplify using.

So what is the bottom line? If you have external charger, and there is no need to shine for a long time, then C8 + will work fine, as well as the C8. They are also suitable for gu mout for hunting needs (you can buy remote button for Convoy as well).

But if this is 1st flashlight is and/or you haven’t bought charger, or if you want to buy sort of an all-in-one kit (flashlight with built-in charging + battery), if you need to shine for a long time without a drop in brightness – look towards Convoy M4U.


As you can understand, the impressions are almost all positive. Of the minuses, I note that the button can skew, the charging current should be higher. That’s all, I hope that this Convoy M4U review of mine showed what to expect from this flashlight.


Edited by: Lumeniac on 12/07/2020 - 12:16
Last seen: 1 day 20 hours ago
Joined: 03/28/2017 - 23:42
Posts: 164

simon,M4U with XHP50.2 3V please.