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Old Jan 30, 2013, 02:45 PM
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Italy, Toscana, Orbetello
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Accucel 6 - Balance problems

Hi everybody!
I've a new Accucel 6 and three brand new Turnigy 2.200 3S 25C Batteries.
When I charge the battery, one per time, at the end of the cycle the Battery charger gives me a measure of 4.18 - 4.18 - 4.18 Volts (should be perfect!).

But when I measure with a multimeter, I've 4,18 - 4,18 - 4,26 Volts, that is totally dangerous for the third cell (over 4,20 Volts).

This happens for all the batteries: I make the balance charge and at the end I've differente measures between Accucel 6 and my tester, and the last cell that has always 4,26 Volts on my multimeter.
Even if my multimeter is not professional, I'd have the same measure on all the cells, but it's not so and I'm sure that is something wrong in the Accucel.

Do someone else had the same problem?

Is it possible to solve it?

Thanks everybody!
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Old Jan 30, 2013, 02:48 PM
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United States, AZ, Tucson
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Sounds like you better buy a new charger! over charging a lipo is bad news!
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Old Jan 30, 2013, 03:04 PM
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So. Cal.
Joined Oct 2004
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Calibrate it!!!

Calibrating the Turnigy Accucell-6 Battery Charger (4 min 23 sec)


TURNIGY ACCUCEL-6 Battery Charger Calibrating (1 min 50 sec)


Mark
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Old Jan 30, 2013, 03:12 PM
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There's 2 flavors of the Accucell-6 floating around. HK sends it and you don't know which one you get until you get it.

The newer one does not have the calibration menu on it; it instead has IR reading.
The older one has calibration, but no IR.

so if you don't get into the calibration menu, you have the newer one.
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Old Jan 30, 2013, 11:15 PM
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I have 2 Accucell 6 chargers. One is about 4 years old and is the 5 amp version. I have calibrated that one.

The other is about a year old and is the 6 amp version. Just checked it and it does go into calibration mode.

I did read somewhere that they came out with one that can check internal risistence and that when they added that feature the calibration feature was dropped.

I'm no battery expert. So, is 0.08 of a volt an issue?
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Old Jan 30, 2013, 11:34 PM
Dude, I do fly all day long!
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San Jose, California
Joined Dec 2007
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Quote:
Originally Posted by tacx View Post
I have 2 Accucell 6 chargers. One is about 4 years old and is the 5 amp version. I have calibrated that one.

The other is about a year old and is the 6 amp version. Just checked it and it does go into calibration mode.

I did read somewhere that they came out with one that can check internal risistence and that when they added that feature the calibration feature was dropped.

I'm no battery expert. So, is 0.08 of a volt an issue?
Yes. I have both; one with the calibration menu and one with the IR reading

The calibration one lacks IR, and the IR one lacks calibration

Turnigy Accucel-6 has IR readings (1 min 12 sec)
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Old Jan 31, 2013, 03:13 AM
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Soiunds very predictable:

http://www.rcgroups.com/forums/showthread.php?t=1788569
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Old Feb 02, 2013, 02:08 PM
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Quote:
Originally Posted by mrforsyth View Post
Calibrate it!!!

Mark
Thanks everybody.

I can go in the calibration menu, and I already did it, but for sure it's not this the problem: with calibration menu You can calibrate the total voltage, not the single cells voltage.
I bought two of them: one for me and one for my father: its one is perfect!
He measures 4.20 Volts on each cell and, when he measure them with a professional multimeter, they're exactly 4.20 Volts.
Just to make an experiment, I asked him to make a calibration of +5 on the calibration menu and at the end of the balanced charge he had again 4.20 Volts on the Accucel's display, but with the multimeter he measured 4.18 Volts, equals on each cell.
Mine is not so: I read 4.20 Volts on each cell on Accucel's menu, but when I measure it I've got 4.18 - 4.18 - 4.26 Volts and this is bed.
I discharge the single overcharged cell till 4.18 Volts with a bulb, but it's boring.
I've ordered an iCharger 106B Plus and in the meantime I'm charging each single cell alone, as 1S per time, connecting to the battery charger output two wires of the balance connector.
In this way I use three charging cycles for each lipo, but at the end I've exactly 4.20 Volts on each cell.
I think that my Accucell is fake or bugged...
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Old Mar 31, 2013, 03:18 AM
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one of these may help ..until new charger arrives
love my Balance pro............just one location below

http://www.amainhobbies.com/product_...=Product-Feeds
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Old Mar 31, 2013, 03:27 AM
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HELP!

my accucel does the same but WAY off
my balance charge reads 4.12/ 1.83/ 4.09 ... on a perfectly balanced
12.3 battery brand new
check by DVM and Balence pro to be 4.1x3

has anyone hacked one of these yet ..or do I just send it back .......
....IF they believe me.......... bought from HK

thoughts and or suggestions please...
it will charge to 12.6 ish on a nonbalence charge ( do that with B Pro attached).

and other voltages are ok as I have been double checking everything
so it seems just the balance taps are Fddd up ????? help
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Old Mar 31, 2013, 03:50 AM
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USA, NC, Wilmington
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Quote:
Originally Posted by K9000wner View Post
HELP!

my accucel does the same but WAY off
my balance charge reads 4.12/ 1.83/ 4.09 ... on a perfectly balanced
12.3 battery brand new
check by DVM and Balence pro to be 4.1x3

has anyone hacked one of these yet ..or do I just send it back .......
....IF they believe me.......... bought from HK

thoughts and or suggestions please...
it will charge to 12.6 ish on a nonbalence charge ( do that with B Pro attached).

and other voltages are ok as I have been double checking everything
so it seems just the balance taps are Fddd up ????? help
http://www.rcgroups.com/forums/showthread.php?t=1788569
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