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New 1100 mAh A123 available everywhere and no word here!

Old 05-09-2008, 01:35 PM
  #151  
everydayflyer
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Default RE: New 1100 mAh A123 available everywhere and no word here!

Then there is a problem with the CellPro or battery.

If you built packs from the VPX battery packs you did remove the thermistor and such from the cells,correct?
Old 05-10-2008, 02:24 PM
  #152  
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Default RE: New 1100 mAh A123 available everywhere and no word here!

Yes the diode or what ever it is is gone.
Old 05-18-2008, 01:47 PM
  #153  
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Default RE: New 1100 mAh A123 available everywhere and no word here!

Since this thread seems to be where the latest A123 info is going...

The July issue of RC Car Action has a roundup of new products from RCX 2008, and among them is an "A123 Racing/Enerland Nanophosphate Charger." There's a small picture of a little charger thing hooked up to one of the yet-unreleased 2200 packs. The charger looks small and familiar, like it's a derivative of some charger that's already out. But I can't pinpoint it so it may be a coincidence. The description is as follows: "New from A123 is this charger that charges Lithium Ion batteries. It charges a pack in 15 minutes and features automatic balancing." It says it's too new for a part number or price.

If anyone is interested it's on page 82 of the July 2008 RCCA.
Old 05-18-2008, 09:01 PM
  #154  
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Default RE: New 1100 mAh A123 available everywhere and no word here!

I love it this is the Official A123 Racing Support Forum and news / info has to come from other sources. See post 142 and 143.

IMO A133 Racing is way behind the curve on supplying chargers and battery packs. There are many very good LiFePO chargers availble now with more capabilites than the A123 Racing ones.

Thanks for the info.

Charles
Old 05-19-2008, 04:59 PM
  #155  
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Default RE: New 1100 mAh A123 available everywhere and no word here!

Hi everydayflyer,
I took your advice and have been going to RC Groups for A123 posts/info. I still check here, but not too often.....Brian
Old 05-20-2008, 05:19 AM
  #156  
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Default RE: New 1100 mAh A123 available everywhere and no word here!


ORIGINAL: thaus

I have had trouble balancing an 1100 A123 pack with the fma cellpro 4s. I could ballance the pack using a resistor to lower the high voltage cell and charging the pack again (with several iterations). So I sent the battery and charger to FMA. They returned both saying there is a bad cell in the pack.

I bought another pair of 1100 cells and am getting the same results: a 300 mv difference between cells. What is wrong?
Contact FMA. This is a "known" issue, and latest firmware update to 2.08 resolves this 1100 VPX cell peaking issue.
(Sorry to crash the A123 thread, folks....just saw thaus' post, and wanted to help)
Old 05-22-2008, 04:46 AM
  #157  
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Default RE: New 1100 mAh A123 available everywhere and no word here!

There is a full page ad in the June issue of Model Airplane News (page 54) for an A123 Racing "NANOPHOSPHATE 1100" 6.6V battery pack. Also on the page are a "18650 cell" and a "26650 cell" with specs. A "Sonic Charge" charger is there as well.
Pierre
Old 05-22-2008, 04:13 PM
  #158  
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Default RE: New 1100 mAh A123 available everywhere and no word here!

Howard at FMA said version 3.02 is the most recent firmware. This is what I have and cannot balance 1100s. I know the cells are good because I have charged them individually and get full mah out of the pack.
Old 05-23-2008, 09:41 PM
  #159  
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Default RE: New 1100 mAh A123 available everywhere and no word here!

ORIGINAL: vol

There is a full page ad in the June issue of Model Airplane News (page 54) for an A123 Racing "NANOPHOSPHATE 1100" 6.6V battery pack. Also on the page are a "18650 cell" and a "26650 cell" with specs. A "Sonic Charge" charger is there as well.
Pierre
Not sure what your point is. I stsrted this Thread on 11-06-07 and this was approx. a week after I started a sinilir Thread on RC Groups and wattFlyer.

It is now 6 1/2 months later and A123 Racing still does not have the 1100 mAh packs or a charger for them. Brian rarely respons to any post.

I just find it strange that the Official A123 Racing Support Forum gets very little support from A123 Racing and that they are so far behind other vendors supportin their cells / batteries.



See post # 144 . Three weeks and no reply.
Charles
Old 05-28-2008, 02:46 PM
  #160  
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Default RE: New 1100 mAh A123 available everywhere and no word here!

Five more days and still no reply.
Old 06-08-2008, 11:33 AM
  #161  
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Default RE: New 1100 mAh A123 available everywhere and no word here!

It has now been five weeks and no reply.


http://www.rcuniverse.com/forum/fb.asp?m=7459491
Charles
Old 06-22-2008, 02:00 PM
  #162  
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Default RE: New 1100 mAh A123 available everywhere and no word here!

Two more week s and no reply.

Charles
Old 06-27-2008, 02:48 PM
  #163  
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Default RE: New 1100 mAh A123 available everywhere and no word here!

has anyone checked BPHOBBIES.COM? i have not confirmed the stock status, but they are advertising the 1100mah 6.6v packs
Old 06-30-2008, 02:12 PM
  #164  
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Default RE: New 1100 mAh A123 available everywhere and no word here!

Should I say another week and still no reply? Perhaps they are posted on the A123 Racing site now.


Yes the A123 Racing packs are now being carried by more vendors ,one of which is http://www.battlepack.com/A123P.asp


CharlesB
Old 07-01-2008, 08:03 PM
  #165  
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Default RE: New 1100 mAh A123 available everywhere and no word here!

Hey nice link everyday flyer, not bad prices on there (for those of us who would buy a pack like this rather than assemble one ourself).
Old 07-03-2008, 11:58 AM
  #166  
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Default RE: New 1100 mAh A123 available everywhere and no word here!

Each of these VPX packs has a little thermistor in them. They appear to have the same temperature/electrical characteristics of the Eagle Tree Systems temperature probes, so save yourself a few dollars and recycle them.

For all I know, these are a pretty commonly used part and may also work with other temperature sensing electronics in our hobby.
Old 07-22-2008, 08:20 PM
  #167  
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Default RE: New 1100 mAh A123 available everywhere and no word here!

I appreciate you guys doing all the research and everything, But! the truth is Im just not that technical as you guys are so Im just going to through this out there and if you can help, Great!

I am currently running a Turnigy 4040kv BL Inrunner with a Castle 36A ESC in my EDF Rafale Foam Jet. I have recently built a 4s1p A123 pack from the VPX packs in Walmart. The original Battery is a 11.1v 1300mah 20C Lipo. but seams a bit under powered so I thought this would give it some life.

Question: What is the total capacity of the Battery. I know the voltage is 13.4V
What Charger would be best to quickly charge this pack and how do I ballance them.

And finnaly....Am I nuts for trying to run this 4s pack with this setup? I mean is it going to melt the motor! The ESC can take 14.2v I believe.

Thanks

Trevor
Old 09-06-2008, 03:06 PM
  #168  
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Default RE: New 1100 mAh A123 available everywhere and no word here!

Hi you'all, I have a question for you guys to see if you can guide me in selecting a way to go, I am building a 1/5 scale P-39 cobra from scratch, that is going to wheight in the neiborhood of 20+ pounds, and span of 80", and am thinking of going electric instead of gas, I have found the electric motors that I need and the ESC also, but I need help on the battery issue, the motor runs on any where from 20 - 48 V, and it will probably use a trungy 100 A, ESC, it needs to swing a 18x10 thee bladed prop, I have been hearing very good things about the A123 battery, and I want to use them to power the moster motor that I am planing to buy, my question is where do find a good charger to charge the A123s at 10 amps , and the packs are going to be at least 6s1p how do I find out the rated MaH for each cell so I know wich ones to buy I need to make at least two packs to run the motor with about 37 Volts, but I really would like to do two packs of 7s1p, to run 44 volts instead, I know very little about electrics ecxept what I have been reading in this forum and really would apreciate all the help I could get, what charger do I get to be able to charge two 7 cell packs at the same time, automatically, and that it will run on AC/DC current to power the charger? and that it delivers 10 amps for rapid charging ? ANY HELP IS GREATLY APRECIATED, thanks C Rod.
Old 09-06-2008, 07:53 PM
  #169  
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Default RE: New 1100 mAh A123 available everywhere and no word here!

Hirodman293 ,

Well first off this is a thread on the 1100mAh cells and they ones you will be needin are the 2300 Mah one . They are 26mm X65 mm.

The largest A123 packs I fly are 5S 1P in appox. 4 ft. WS , up to 3 3/4 pounds.

There have been some rather large electrics which use A123 cells. A thread her on RC Universe
http://www.rcuniverse.com/forum/m_7303539/tm.htm

There are a lot more active users and a great deal more imformation available on RC Groups. RC U is OK but I often refer to it as the dead zone.

Hyperion DUIO charer will do two 6S A123 at once but if you go past 6S packs there are non that I am aware of that do multi packs.

To charge a 6S A123 at 10A requires 6X3.6X10=216 watt output and even the DUO is limited to 180 watt per channel so approx. 8A for 6S .

Some use a Mastech 5020 bench power supply. Variable volts up to 50 and variable amps up to 20 so 14X3.6=50.4 v close enough and could charge them at close to 20 amps.. It requires 120V AC input however.

Charles
Old 10-11-2008, 08:40 AM
  #170  
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Default RE: New 1100 mAh A123 available everywhere and no word here!

What is the advantage of using 2 A123 packs for a reciever over just using 2 6 volt nicd or nimh packs?
Old 10-11-2008, 05:39 PM
  #171  
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Default RE: New 1100 mAh A123 available everywhere and no word here!

everydayflyer,

I've built my first two A123 3S packs (based on the B&D VPX packs) for my Foamy FW-190 and a GWS A-10. I built them both with balancing capability as well. So far I am thrilled with the results.

But I've been trying to convince a couple of friends that are still stalwart Li-PO lovers about the virtues of switching to A123's and say that a 3S 1100mAh A123 pack is just not going to equal to any Li-PO 3S 2200 - 2400mAh 25C pack. They also site the difference in nominal stated max voltages of the two types, not delivering the same engine RPM.

So how do I convince them that A123's are better and why / how?

Also -
Are the A123's in the Black & Decker VPX packs true M1's?
Are they Li-Nanoferrite (LiFe) or Iron ferrite?
Are they 3.3v or 3.6v?
Really 1100mAh?
What voltage should they be charged at then?
What amperage?

My recently new model "Mystery" brand charger does have a LiFe program and wants to charge my packs at 3.3v. Fully charged I'm seeing 10.52v

Just for yuks, thought Mr. Black and Mr. Decker should get credit for the cells source, so stuck the VPX pack label on my FrankenA123 Pack.

Thanks Mr. everydayflyer. You seem to be the resident expert on the A123, best answers I've seen on any of the boards.
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Old 10-11-2008, 06:24 PM
  #172  
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Default RE: New 1100 mAh A123 available everywhere and no word here!

http://www.rcgroups.com/forums/showthread.php?t=914941

Even volts during discharge,faster charging, greatly reduced self discharge,more dependable.


Charles
Old 10-11-2008, 06:33 PM
  #173  
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Default RE: New 1100 mAh A123 available everywhere and no word here!

So how do I convince them that A123's are better and why / how?

Just use them and they will see and learn or not.

LiPolys take much longer to charge,wear out much faster and are damaged so much more easily.

Also -
Are the A123's in the Black & Decker VPX packs true M1's?

Yes they are.


Are they Li-Nanoferrite (LiFe) or Iron ferrite?

LiFePO4

Are they 3.3v or 3.6v?

Nominal open voltage 3.3 discharged 3.6 charged.

Really 1100mAh?

More like 1000 mAh

What voltage should they be charged at then?

3.65-3.7 however I routinely charge them to 3.85

What amperage?

amps. is fine and I have charged repeatably at 10amps.

My recently new model "Mystery" brand charger does have a LiFe program and wants to charge my packs at 3.3v. Fully charged I'm seeing 10.52v

10.52/3=3.506 per cell if 3S so a little on the low side.

Thanks Mr. everydayflyer. You seem to be the resident expert on the A123, best answers I've seen on any of the boards.

Thanks for the kind words.

I have flown A123 cells almost excursively for the past two years. Thousands of flights and have been extremely pleased with them.


Charles
Old 10-11-2008, 06:49 PM
  #174  
Richard D Bahmann aka/Wrongway
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Default RE: New 1100 mAh A123 available everywhere and no word here!

Good info Charles. Any idea on how many charge cycles you have gone to so far? The manufacturer says 1000 but I am curious if anyone has gone much more past that.

Richard
Old 10-11-2008, 09:19 PM
  #175  
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Default RE: New 1100 mAh A123 available everywhere and no word here!

Highest count I have on a single pack is 492. I have another with 340. Both of these are still delivering just over 2000 mAh. As I have a bunch of packs some do not get flown nearly as much as others do.

Factory listed 1,000 cycle life is not at the charge / discharge rate I use them at.


Charles

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