Maha Powerex MH-C9000 Multi cell charging and HIGH explanation.
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- čas přidán 22. 07. 2024
- This video is mainly to address a few things I left out of my original review for this charger.
Specifically:
How it handles charging multiple cells.
What the HIGH means and a potential workaround.
Does it have memory settings.
Affiliate links to products used in this video:
Charger: amzn.to/2RPJvty - Věda a technologie
Cells develop a higher internal resistance (or impedance) as they age due to breakdown in chemistry. Each time you start to charge a battery, the bay does a test of the battery to determine it's internal resistance is healthy. Basically the charger compares the open circuit voltage to the voltage under load which enables the calculation. This helps explain why you might see an initially high voltage after starting a charge.
I have found the MH-C9000 is fairly accurate about determining cells are reaching end-of-life, however it doesn't just give a warning that the cells are getting old, it flat-out refuses to charge the cell. I suppose the reason for this is the battery will create more heat than it typically would, and the charger will be less likely to decipher the end of charge condition (delta V and/or delta T).
As a workaround I have performed an initial charge on another device and then moved the cell over to the MH-C9000. This improves the state of the cell, reducing the calculated internal resistance to something MAHA doesn't measure as HI6H. This becomes an annoyance, so I usually take it as a sign to buy some new cells.
Excellent explanation! Thanks for the details and it is clear this charger is very smart and handles a battery that could be producing more heat due to failing internals in a safe manner that is less likely to cause fire or damage to things. Great to know! If it says HIGH, its probably time for some new cells.
Was wondering whether to get this but read it was too complicated. Really nice, clear explanation of how it works. Thanks a lot.
Thanks. Had this charger a couple of years and love it, but had forgotten what HIGH was, so energizer battery in the bin now. I have found POWEREX batteries to be my best with no problems. Thanks helpful video..
Greetings from Canada. I bought that charger a while ago but it was impossible to understand with the little book of instruction that come with the charger. After watching your video I understand how it work. Thank you very much for that informative video and I wil subscribe to your chanel.
Richard
You have a nice speaking voice. And your presentation was well planned and informative.
Thanks very much! Glad it was an enjoyable video for you!
When you initially set up a battery it'll show you the voltage on the internal resistance of the cell. 1.4 v is healthy, 1.8v is considered wearing out and consider replacement and anything above the 1.8v i would replace. Sometimes refreshing can bring that IR down but in my experience that IR doesn't change much.
+Whispered X You're absolutely correct. usually when it shows "HIGH" it means the cell is likely on its way out, or is already shot. at the price of AAs i don't bother if they're showing that.
I was hoping to find out what each of the codes are. It would be nice to know what refresh analyze, break in and cycle mean
Есть вопрос. Только купил зарядку MAHA Powerex MH-C9000. С новыми аккумуляторами все работает без вопросов. Ставлю старые, которые обычной ATABA АТ-508 (на 4 батарейки, по 2шт на 1 канал заряд) заряжаютс без проблем. И МАХА дает маху. Какой бы режим не выставил, после его активации МАХА сбрасывает его и опять просит выставить режим. Если ничего не выставлять, то по умолчанию ставит заряд на 1000 и все сбрасывает и так бесконечно по кругу. При этом надпись о БРАКЕ не выдается. Как с этим бороться?
The "high" protection feature tells you when batteries are bad. It might read this if you try to charge a near full battery. If you discharge the battery in a flashlight or something it may accept a charge.
Very nice video! I have only one question. When you should use cycle mode? If Break-In can't rescue your battery? As a last resort? Or for another reason ?
I've used cycle mode as a last-ditch effort to rescue a battery that a refresh-analyze or break in didn't help out much. It has worked sometimes, but not very often with the batteries I've had
@@trythistv Why are your batteries dying? From lots of use, or not maintaining them?
I am a beginner in the electronics field so there might be an obvious answer to this so bare with me: I have just bought a new AA/AAA charger - Maha/Powerex MH-C9000 and some new Eneloop 1900mah and Eneloop Pro 2450mah batteries that I have run through the "break in" mode on the charger. Everything works fine but the charger won't charge my older Ni-MH GP 2700mah and PowerBase 2700mah batteries. The display on the charger states that the voltage of the batteries are around 2.3V. and then shuts down the cycle and only states "HIGH" in the display. These batteries have previously been used in my Canon 580EX II camera flash and have done about 50 recharge cycles in a no-name (PowerBase) "stupid charger". I can accept that the hard discharge from the cameraflash and the 4 hour charge cycle can have damaged my batteries but when I meassure the voltage with my Fluke 87V. multimeter it states that the voltage is more or less fine ranging betwen 1.1V. - 1.3V. What is going on here?
jonnebanan its in how the charger measures everything. as the batteries age I believe its the resistance increases, which will cause issues with the mh-c9000, you can take a good battery and some metal paperclips, its difficult to explain, but if you connect it along with the battery that shows HIGH for a few seconds you can sometimes bring them back. I'll make a video explaining what I mean soon
Its not the basic cell voltage displayed, but voltage required to achieve set current. Try setting lower current, like 200mA. That might have easier time (lower voltage needed) to owercome batteries resistance.
Jak niechce ładować starego akumulatora wystarczy wpiąć równolegle sprawny akumulator na czas startu wystarczy 5 sekund i ładuje bez problemu ja tak robię i nawet bardzo stare aku da się naładować tą ładowarką
If the battery says" High" and will not charge, it is not always garbage.
Try another charger. I have lots of old batteries that say "high" in the C-9000 charger but do charge in my Maha MH-C401FS charger. I use the C-9000 to condition my batteries every so often but for day to day use the MH-C401FS is my favorite, It is simple to use, and will charge older batteries the C-9000 won't. It has a switch for 300/1000 ma on the side. Red and green led's to indicate when batteries are charged.
Also, older batteries can get tarnished or dirty on the contacts causing a poor contact which may cause the "high" reading. I use light sandpaper to clean the ends of the batteries and it helps in some cases.
Or you can just place healthy battery there, wait a bit until process starts and then just quickly switch it with "high" battery. If it is not dead, it will charge it..
If the battery says "High" and this charger doesn't charge it, it is 99% dead. This indication means "high internal resistance cell". Another charger, if it is a smart one, will also refuse to charge this cell due to the same reason. However despite the indication, this cell perhaps can be charged in another charger. But if you try to measure it's capacitance in mAh by discharging it right after a charge you will understand why this charger refuses to charge it. Most of the charging energy is lost in form of heat and therefore the stored energy in it is much lesser than the energy spent for charging it. During discharge, the same effect happens. That much lesser energy is even more reduced as the most part of it is consumed by the internal resistance of the cell. A smart charger senses the high internal resistance by sending a heavy initial pulse to the cell under charge, while measuring the voltage developed a cross it's poles. If this voltage hits more than 2 Volt (depending on the manufacturer of the charger) the cell is at the end of its life. None charger can save it. The process is a simple application of Ohm's Law. The lesser the voltage, developed during the initial pulse across the terminals of the cell to be charged, the healthier the cell is.
@@xmeda hey thx mate it works like a charm and btw they should give bad indication but still charge it because with only this expensive charger the batteries still cant charge them so it was much better just a bad battery detection and still continue to charge them
Ye he had to rotate aroud that one battery that presumably got the high error I guess the contacts were bad
As a result of the c9000 hi6h designation, I've later discovered I've thrown out perfectly useful batteries.
How to successfully charge hi6h batteries: Initially use an old nicad 'dumb' charger OR any quick charger then for the final step, a panny cc17 semi-smart charger.
Procedure: Use one of the two chargers(which charger you'll use depends on how 'bad' the battery is, quick charger is needed for almost dead batteries) to 'jump start' the hi6h batteries(short charges in increments of 20 minutes or more) then finish charging using the panny charger. Mark all batteries to indicate their need for this extra attention.
This has extended life for use of these hi6h batteries in low-demand devices like remotes, scales, and led candles. Some batteries will be so bad that only the quick charger alone will charge them.
I realize that this involves extra charge cycles but these batteries are near their EOL so in my mind there is nothing to lose but $.
This is my issue with the c9000 because it will not service hi6h batteries and why I don't use it any more. An already expensive charger is costing you more money by their readings. Don't toss away usable batteries!
If the battery read "high" Manually discharge the battery in a flashlight, then try to charge it. Older batteries will read "high" if you try to top them up. If a fully discharged battery still reads "high" them is garbage. Batteries may still charge in other chargers, however the "high display is a safety feature in the c-9000. Recharging bad batteries could result in a fire!
Yup, from what some have said the "high" warning is somehow related to the internal resistance of the cell, and as they age it goes up which will cause issues with charging but fully discharging them can help, or sometimes using a second good cell with some jumper wires to get the "high" cell to start charging for a few minutes will rejuvenate them enough to work a little longer.
I dont know whats H16H is, can someone write here so i can translate in german?
I have a video explaining the "HIGH" that is showing on your display! It's right here: czcams.com/video/OWhkqNncYg8/video.html
H16H stands for HIGH in English which translates to HOCH in German
I bought brand new nimh battery and i used it for xbox 360 controller
and i want to charge the battery
set 1000 ma and it becomes 0 ma in few second
i waited for 3 hours or more and it didnt charge
whyy
That's bizzare. Have you tried a different mode like break-in or refresh analyze?
i tried it but it is useless
i got same thing again
it can only discharge
What kind of batteries are they?
I have batteries I’ve been using for 5+ years with this charger. I have no idea how many duty cycles.
Same here! I've been using some of the same batteries since I got the charger back in 2011/2012, they're just now starting to wear out but that kind of lifespan on AA batteries is pretty wild regardless of recharge count
@@trythistv … yea, it’s probably more like ten years now that I think about it.
I charge AA 2000 mAh batteries at 600 and 2500 mah cells at 800. AAA 850 mha cell at 300. If you charge cell at too slow a rate the automatic full charge detection will overcharge the cell and damage it. 2700 mha cells can be done at 1000
I'm a little more aggressive, I charge my 2000mah batteries at 1000mah, and my 900mah aaa's at 400, I assume half the rated capacity, and I have been using the same batteries since getting this charger with no failures I can remember, aside from the ones I had been charging with a cheap "fast charger" that charged at like 2500mah or higher, it'd charge a battery in about 30 mins but they didn't last long, a few of those died shortly after learning more and buying this charger, But since getting this charger and running them a little slower, I've had nothing but success with rechargeable batteries.