Very hard to believe that there is a revision with 2 fans !
Robert
Sorry didn’t believed you, I found a place they talk about it here : SkyRC — IFA 2014 — MC3000 charger-analyzer | Candle Power Flashlight Forum
Post 4989
Thanks
Robert
And here it is on stock and the article description says “2018 version with 2 fans, improved Bluetooth reception and improved plus contacts” Hardware Version 1.3+
There’s mention of a firmware v1.14beta. I wonder what’s new and if it’s available for download?
Can SkyRC MC3000 charge protected/unprotected 20700 / 21700 batteries?
Unproteced might fit but the very long protected ones (e.g. the ones from Acebeam) will not fit. They can only be charged if inserted into a canted position with only slight contact to the positive terminal.
Well my SKY RC MC3000 almost made it 2 years…. now as soon as I turn it on, the screen flickers for a second or two, comes on full lit and then the alarm go’s off ? I get Input Volt(age) Too Low error… old PSU is putting out 15.2v DC and I have a new PSU putting out 15.3v DC so I suspect the console has a bit of a problem. I can’t really complain, I used the hell out of it daily, it’s probably 5years old in charger life! Anybody know some one stateside who repairs these? I’m going to order another anyway, but if I can get this one repaired, why not! 
Based on my testing of my MC3000: it fits the Sofirn 4000mAh 21700 (about 71.3mm long)
but won’t fit the Rofis protected 5000mAh 21700 (about 75.8mm long) even when I try to insert in a slanted position - the contacts just won’t fit.
In comparison, the Rofis 5000mAh 21700 also won’t fit the Miboxer C4-12, however, if I insert in a slanted position, the contacts will be enough to touch (so the C4-12 detects and can charge the battery, but holding the battery in place is a problem.
One of my early batch MC3000 is exhibiting a voltage calibration problem. If I calibrate it to be correct at 4.200V it reads wrong at NiMH levels (reads 1.285V when actually 1.294V). Not a huge problem, since exact NiMH voltage level isn’t that crucial when terminating with -dV anyways. Other (newer) MC3000 works perfectly.
Except my newer one with two fans that has failed badly.
I don’t have one of those most recent two fan ones.
I had three, sold two to my friends and the one I kept, bay-1 failed, then bay-4 just failed after playing up and now bay-3 is playing up.
Called one of the two friends I sold one too and he is saying bay-2 is doing badly.
Would this mean that the dual-fan version may have a higher failure rate? Maybe use slightly substandard components or something?
Was my first thought. Either that or maybe they switched suppliers of some components and didn't do a good QC on them.
Hello! I am new here :). I am thinking about MC3000, it will be my first inteligent charger, I have previously one for RAM and another for NiCD/NiMH - some noname charger which charge 4 batteries but in pairs only.
MC3000 seems great for me as I like to play with things :). But I am curious to ask owners, how good is the bluetooth connection and app? I found over internet that it is bad, app does have only 2.7/5 rating on play store. Many people cannot even connect to charger. So there are compatibility issues, or were they and everythign is fixed in newer app/firmware? I have linux on my PC so connection to PC with usb is limited. I CAN reboot to windows but I prefer not to as I am using it only for connecting to my work during homeoffice days. But, if I reboot to Windows, setup the charger, does the software need to be running or I can close it and leave windows? Will the graphs be visible even later?
I need that my wif will be charging batteries from time to time (it will be mostly me) and for her, it would be great to have easy solution - place batteries and maybe press one button.
The app seems much easier to use then UI on charger, it would help a lot. BTW, can it be used by two different phones? One day my phone, another day my wife’s phone?
I am 60% for MC3000 as I can do graphs of charges and what I mostly want to do, discharge graphs of nonrechargable alkaline batteries. Other chargers will just give me capacity…
40% is on GYRFALCON ALL-88 (4 slots version is unavailable…), Miboxer C4-12 (or C8, 8 slots seems great thing for future as I want to change to rechargables nimhs and maybe lions all batteries in house, one by one), LiitoKala Lii-500. Gyrfalcons does not have discharge, do I need it if I won’t have graphs? 
Do I need discharge? Is it needed to do from time to time?
Noone? GB has great sale now, MC3000 for only 75€ including shipping from Czech republic so no taxes and fast shipping.
I found that for discharge graphs, I can buy cheap skyrc iMax B6. So MC3000 might be overkill. But none other charger do what does MC3000…
Mostly I will be charging eneloops so Lii-500 will be undercharging them. Not what I want.
gyrfalcon and miboxer does not discharge but maybe I do not need it? I will charge batteries when the device says it is empty.
Miboxer costs more then Opus BT-C3100 which have trickle charge which is not good for eneloops - if I leave it charging all night so it is full at morning, it is not good.
Everything is still leading me back to MC3000 and I have only a few hours to decide. The dumb mode in MC3000 is usable? Put battery in and start charging. From videos, I see that advanced mode is enough for me, dumb would be for my wife (she is not stupid but she just do not want to use complicated electronics :D).
ALL-88 is very near in the price of MC3000, 8 slot would be nice tough.
If you buy the MC3000, make sure Gearbest is selling the latest hardware version (with two cooling fans on the bottom).
The blue tooth app worked perfectly on my iPhone, but can't comment on other phones/devices. Honestly, the blue tooth function isn't really needed, it was just a curiosity/gimmick for me.
Concerning the discharge of alkalines . . . the MC300 has the helpful "DC Reduce" function which slows down the discharge current rate of the battery towards the end of the discharge cycle, to account for the ability of alkalines to recover.
Yes, dumb mode is exactly what it implies; put battery in and start charging.
I got two MC3000's I use regularly, for a while now. Never used the BT or app stiff - just don't have a need.
Gearbest says it is newest revision with two fans (and that there are no other changes in this revision to previous one - only the fans, so I hope it is really newest). A lot of people were asking them which revision they offer. On the photos, it is newest revision.
I like the idea of app in phone (even when I mostly use phone for calls and SMS, I am not appcollector 
) because it is much easier to setup the charger. But from videos, the app does not offer all the options…
EDIT (add): I had no idea that there is “DC Reduce” function! That seems really interesting. Question is, when I test about 20 different alkalines, if I will still need all these functions of MC3000… I just want to test them because all the test over internet are on different batteries, not available in my country. And there are no test in my country on batteries. I am just curious about this and planned to do it with arduino+raspberry pi and some software and hardware :D. A lot work which I am postponing for two years now…
Cool, so my wife can use dumb mode and even sometimes I will when I do not have time to set all the thing it offer in other modes…
Thank you, good to know it is used, all I can found was usually problems. That is why I asked for owners :D. There might be ten thousands of happy users but only a few will do good review. 1% of users might have problems and they all do bad reviews :).
I am thinking again to buy two chargers, Lii-500 for lions and Opal BT-C2000 for nimhs. Cheaper then CM3000 and easier to use…