Are you saying the genuine charger overcharges Li-ion batteries just as bad as the one in this video???

No the fake ones have one more feature over the real thing - they can cause a fire. Glad you;'re enjoying your fake charger and love I the way you throw those dice!

Well said bro

Hahahahahaha yes yes

there's an easy fix to the problem by calibrating the chinese version to properly read the voltage...this video shows you how - kzfaq.info/get/bejne/oLdmm8uBnMq6poE.html

If you bothered to check, you would find out that the components in it are seriously underspec compared to the genuine item. Have you checked the calibration of your unit at all? None of the fakes I have seen reviews of or actually used are well off calibration and clearly were not QC'd. I would suggest that you are definitely playing with fire. It's only a matter of time.

@@davesherry5384 till this day that's my to go charger still works today I have charge hundreds of time with no heat issue of any kind

@@davesherry5384 there's an easy fix to the problem by calibrating the chinese version to properly read the voltage...this video shows you how - kzfaq.info/get/bejne/oLdmm8uBnMq6poE.html

+DeltaQ n does this fix the over charge problem?

+DeltaQ n Doesn't work on my fake iMax B6, don't get the menu. Worked on my genuine B6 though.

+salle rc  1 - hold - start button and decrease button at the same time 2 - plug power adaptor,on. if this does not work. so it is broken

might need to flash firmware to get the calibration menu back, the problem is with resistors used in the voltage measuring circuit. theres a topic in the rcgroups forum about it and how to mod it to correctly read cell voltages and current. The problem lies in the resistors used are 1%, if you replace them with 0.1% tollerence resistors, this greatly increases the accuracy.

Do you have a link to that rcgroups thread?

It is correct that batteries have internal resistance, but that creates a lower charge on the cell, not a greater one. The the charger sees the voltage before the resistance and should stop early if anything. It is not so much my particular unit I am worried about, rather the people that have reported swelled, overheated or exploded batteries. Some have hundreds of mV overcharge on one or more channels. It is the act of creating cheap unreliable products in another company's name that I don't really like, and worse when the product could end up burning down somebody's house.. or worse..

Your charger is fine from what I've seen, and your message is good as we should never let our guard down around lipo's. I never said that a batteries internal resistance creates a greater charge, the opposite in fact. I was saying not to worry too much if your charger is at 500ma and you are reading a couple 10's of millivolts over 4.20, it is just the internal resistance times the charge current making it appear to be over charging. It's the resting charge voltage that matters. If your charge current is at a tenth of your charge rate, say 50ma, and your charge voltage is up around 4.25~4.35 then you might want to watch that charger closely for a while. If I put my imaxb6 in fast charge mode, which it appears yours was in, it will charge to 4.4ish and then shut off abruptly and does not slowly reduce the current as it nears 4.2 as it does in normal charge mode. After the battery sits a few minutes it settles around 4.18v per cell. This is done to combat the internal resistance taking forever to charge through. cheers

Sorry, I misunderstood you then. The charger should still never assume anything about resistance, just CC charge to 4.2v then keep a constant voltage until the charge current is less than 0.05C. One should never continue to charge with a constant current and just cut it off at the right moment for the resting voltage to be 4.2v. The internal resistance is more than just a resistor. As with any chemical reaction it takes time to equalize. I guess a single cell could be modeled as multiple smaller cells in parallel with resistors between them. If one resistor is smaller, this part of the cell will charge faster. Pushing the voltage higher would overcharge that part of the cell. once the power is removed, the cells will self balance through the resistors and end up below 4.2. I was using the regular CC/CV charge for the test. and the battery still measured above 4.2 when disconnected. It was the crappiest of all cells used and it dropped below soon after. A perfectly good cell would stay "overcharged" for longer.

Thanks for the video, I look forward to more! Cheers

Thad ward 😆 ...shady shaderson 😂

Rinoa Super-Genius Hi, thanks for your comment :) Sorry if I make it sound like that. What I mean is exactly the same as you mention.. I also explained the same thing in a few comments (not expecting you to read all the comments of course, it should have been more clear in the video). It's just that the damage vs voltage curve is exponential, so when charged to 4.2 V the overcharge does significantly more damage than it would do at 4.0 V (wouldn't be overcharge at 4.0, but you get the idea) The reason I am overreacting a bit is that my unit is very likely not the worst one on the market. And once you get to around 4.3 - 4.4 V the batteries can swell and catch fire if you are unlucky.. Knowing how little it would cost to manufacture them accurate to 4.2 V +/- an insignificant amount, I wonder if they even care about people's safety. Probably talking less than 50 cent.

EcProjects ah ok, sorry about that then. its impossible to make everything in a video perfect. its taken me like 2 years to get my diy e-bike battery video into a format that answers most of people's questions. i doubt it would cost 50 cents to pay a worker to calibrate the charger for you, that could take a bit longer. and who knows maybe they did already go through really bad calibration. i just think its normal to calibrate things when you get them though.

EcProjects (& Rinoa Super-Genius) - Really appreciate the work you have put down here, it is scary to see how few people actually control measures their batteries after (or during) a charge. Are their any other charger on the marked that is fairly priced that you rather recommend?

my multimeter cost me 5$ as precise as my 120$ car battery charger. I do think 50cent is enough. my voltmeter as all the other thing too

Rinoa Super-Genius could you send me a link were you bought your imax

good luck serving the summons papers on some fake chinese company that changes its name 7 times a year and operates after hours. i guess you could take Amazon to court, if thats where you bought it from, but i think youd have better luck finding that illegal operation in a back alley of shenzen than taking on amazon. they sell counterfeits all the time and are guilty of wilful negligence. some of those products are health and beauty products people ingest or put on their skin, so more dangerous in a sense...the government doesnt care, amazon just pays them off.

What you describe has NOTHING to do with the problem that is described here. This is about the individual cells having incorrect voltages, not what voltage the whole pack gets charged to. This is about an ERROR in the voltage detection circuit. On KZfaq, the idea is to watch the whole video, and THEN make your comments. That way, you have some chance of not looking like an idiot.

there's an easy fix to the problem by calibrating the chinese version to properly read the voltage...this video shows you how - kzfaq.info/get/bejne/oLdmm8uBnMq6poE.html

@@MrEnajiza No...

Whats the hack?

1CoLoRz2 You're welcome.. Yours might not be bad, who knows ? :)

It's actually not too bad, I just have to keep an eye on it and test it with a volt meter. It's usually .1 volt ahead or below what it says.EcProjects

Yes, in the programming mode you can actually set charging to like 4.0v which is 80% charge which means your cell will last more charge and discharge cycles

mais power adapter

i have the same but enter and decrease doesnt do anything

Yes, the minimum is 11V for genuine SkyRC and 10V for clones. However 12V 1A only gives you 12W maximum power, which is very small considering that the charger is capable of about 5 times that amount. So, with 12V 1A = 12W you can only charge multi-cell batteries quite slowly.

+Kanari Mentos Thank you..

You can check if it has the genuine hologram on the bottom side and the serial nummer. As explained in the video.

no need, fake charger work well and true same than genuine have. no problem newer has. save only lot money buy 1-2 fake or one genuine. this fake have you lifetime good charger. and newermind if broken you can buy 4-5 new fake charger same money than one genuine, and you lifetime you not newer need 4-5 charger only 1 and if bad lucky and go broken 2 charger all lifetime.

@@1959Berre - yes, but that has nothing to do with the question that was asked.

if ill use 12v supply with more than 5amps it should be ok?

brovic777 Sorry, I don't have one.. But if I ever get one, I will :)

Buy the cheap fake one it comes with a hall of a power supply I have one and it looks similar to a laptop plug. I also still use it. But plan on going ahead and getting a redcatracing one from the dealer here. It cost the same. I have used the fake one for alil while now but just got into getting 50 to 100 dollar smart batteries and don't wanna mess that up

this have 11-18V input, NOT can

You'll need a step down module as this needs 11 to 18 volts

Eyal S its an 80w charger so youd have to count on a limiter within the charger or the supply. they got power supplies on ebay for this. type "imax b6 adapter" and theyre only 7-8$.

​ Aliens Anonymous I need some power supply that will limit the input to 5 amps so it won't be able to draw more than that? I thought that it was ok if I have the same voltage specification and more than the required amps.

you might be but its not rated for it.

Yes, "bin" does not exist in any Chinese business model. They don't throw anything away. If the product does not pass QC, it is sold in bulk . This goes for batteries, props and almost anything you buy from Chinese sellers at Amazon and eBay. They lie.

+Francisco Mendez The Price

ALL RC car ,boat,plane,battery can charge this imax. no problem and have wery good 100% same board have inside fake and genuine.

lez briddon youre ok, EcProjects go to charger calibration you use LiPo settings!!!! and you need use LI ION settings, read the manual man!!! I RECOMEND THIS CHARGER READ THE MANUAL INSTRUCCIONS MAN!!!!! after test man

spydy09 theres 2 settings for calibration depending on firmware, and 2 voltages to set, one setting is the invidual 4.2v cell settings, and the other is total pack voltage, the cell voltages and total pack are used for balance charge and pack only for fast charge BUT if they are not set accuratly then you can calibrate the charger so it never completes balance charge!

Nope, I didn't run the charger calibration. spydy09 The reason why I don't recommend it is still, it's counterfeit. An unknown company pretending to be someone they're not with no quality control what so ever. What if they got other issues. Worst case, a man plugs in his battery before going to work and comes home to find his house burned down ? I'm not going to recommend that. Li-ion is not just Li-ion, it depends on the electrode materials.. 3.7V is 3.7V though.

EcProjects I think you need to research Li-ion and Lipo. They are not the same thing and just because the voltage is the same does not mean the batteries are the same. For instance Ni-CD and Ni-MH have the same voltage also. I think if you research you will find that Lipo's and Li-ions have a lot of difference. Even different energy density and one was invented like 30 year before the other.

David Irving The problem here is that I DID research it. And again I recommend reading the following, batteryuniversity.com/learn/article/the_li_polymer_battery_substance_or_hype also check out their articles about Li-ion types.. There is another great site out there, I will link it in if I find it..

how much time u need for charge the 3S pls ?

@@lalig88 - Less than an hour.

Thanks for the comment :), I will check if mine has the same problem..

I got one of the fake one's as well, I complained and was given a full refund, also because these are counterfeit goods and if you make the seller aware it is illegal to distribute counterfeit goods they will often refund you and let you keep the product as to send it back means your also distributing counterfeit goods ironic really, not a position anyone wants to be in the first place. So I got my money back and was told to keep the fake IMAX. Do a search on "REPORTING COUNTERFEIT GOODS"

Ni-Mh and Ni-Cd are much more forgiving, but can certainly overheat too, just keep an eye on them :)

Well, there are a lot of opinions :) I'm not going to argue which are right and wrong, but generally the higher the voltage the shorter the lifetime of the battery. You can even gain a bit by only charging it to 4.1 or even 4 volts. The decomposition is exponential, so you won't gain as much life expectancy by dropping the voltage to 4.15v as you would lose by increasing it to 4.25v. Heat also influences the rate of decomposition. My problem with the charger is not the "amount of overcharge", it's more that you can't trust the "unknown" manufacture. I have seen some of these chargers that over charge much more. Even to the point where the battery swelled up and vented the boiling electrolyte, and some that "just" died after a few cycles..

+steve Boss (dj bb boss) some people. {and there are quite a few in 7 billion} cant afford original items which is why there is a fake market in the first place, chinese people are very clever, and there stuff should be looked at as a necessity rather than a pain, we created the pain in the first place, i have repaired{before even using} mine and upgraded internally so now it will out perform the original, all for less then two bears or a packet of smokes, just saying,

+vassilij zietseff (davlyn) You dont live in the UK do you.... If you spent the cost of repairing / adjusting your fake charger by the price of a packet of cigarettes ( smokes ) then you may as well buy the real charger in the first place....... at £9 a pack of 20 , as I know to my cost being an ex smoker they are taxed to extreme here in the UK so your comparison to smokes isnt a good one here in the UK..... :)

steve Boss hi steve yes i am in UK, i have ordered two of these one from hobby king{aint got a clue when it will arrive } and the other from tvc-mall here on friday i have ordered a multiplexer 4051 and mosfet IRFZ 4N.. ZRF 510 {will do} all 80+pence each times 4 of each set the rest is down to soldering and cable replacement, and digital in line internal fuse these chargers are the cheap cheap type without psu now i am disabled from birth on benefits all my life i am 62 no money or very little and last sept 7th dr roddy mrs, told me at shrewsbury royal hospital to put my house in order, i am dying,, i believe in GOD and i do not believe in slagging off other races because they do things differently, NOT KNOCKING YOU STEVE, but with a little know how it is doable on the cheap. dave

steve Boss i meant roll ups half the price ???!!!

+vassilij zietseff (davlyn) I am an electrician Dave, My only advice ( and although I have some knowhow in electronics i'm no expert ) Make sure what ever adjustments you make as far as calibration and so on that you install short circuit protection and overload protection as this seems to be a key fault on the fake chargers, the lack of protection that is. Fine if you do that but again as I said before alot of people will buy these fake or copies and not realise that they are not safe without firstly altering them and I myself after actually experiencing 2 fire's , one where a Lipo went off like a roman candle firework because it overheated while charging and another when the cheap plug shorted and the battery burst into flames all while using cheap chargers that came with stock supplied radio controlled toys, one a boat and one a heli........... Dave, its just a case of fine if you are sure what you are doing is okay and safe but if you are a novice then beware.

you can't balance charge a 1cell battery

this have new Version 2.0 have usb connection and can use pc charge information looking. no newer need but fine option hahah .

+kuhrd That multi meter is a Fluke 8846A costing over $1500.00 with accuracy of .0024 NOT 3% as you stated. So i'm pretty sure its NOT the problem here.

Thomas Miller I wasn't referencing the fluke in the video, notice I said consumer multi-meters. The average consumer is going to have a cheap multi-meter that is probably no more accurate than +/-3% if they have one at all. The multi-meter circuit used for these chargers and even in the real iMax B6 are not very accurate but they are accurate enough to do the job. The one nice thing about all of the clone units I have seen or tested is that they all measure about 0.1v above the actual battery voltage when measured on my 5 digit HP meter. so they should actually prolong the life and increase the number of cycles you can get out of the cells they charge. The one real iMax B6 I bought from SkyRC actually measures about 0.05V under what it reports on the screen right out of the box so when charging it actually runs at 4.25v in constant current mode which is a but high but a quick calibration fixes that as well.

there's an easy fix to the problem by calibrating the chinese version to properly read the voltage...this video shows you how - kzfaq.info/get/bejne/oLdmm8uBnMq6poE.html

Antoine Pedneault Apart from overcharging, yeah it does "charge" hehe :) It's working, but I wouldn't leave it unattended :/

Did you watch the fucking video before asking?

dmanmoka Thanks for the advice :)

OneCupOfCoffee204 they use the same method of charging

WRONG. The conclusion is that the INDIVIDUAL cell voltages are being detected wrongly. Whether the charger is set to LiPo or LiIon (or any other chemistry) makes absolutely ZERO difference.

Working?