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RE: A123Racing Battery Questions - 11/15/2006 11:28:16 PM   
OCR99


 

Posts: 43
Joined: 7/13/2004
From: PLOVER, WI, USA
Status: offline 		Brian
Can you charge more then one 3s19 pack at a time if you connect them to charger in parralle if so doese it thak twice as lone
Rick



(in reply to Nightshift)
       Post #: 76

RE: A123Racing Battery Questions - 11/17/2006 6:03:38 PM   
totally losi


 

Posts: 100
Joined: 7/8/2004
From: Fort Walton Beach, FL, USA
Status: offline 		I have some questions about your batteries dimensions. The 6.6v 2300mah 2s1pand 6.6v 4600mah 2s2p batteries have the same dimensions 153mmX28mmX53mm. How is that possible? Is the153mm the length,28mm the width,and 53mm the height of the battery? Does anyone have a XXX-4 & XXX-T that uses the 6.6v 4600mah battery? If so does the battery fit or did you have to modify something to make it fit?

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Alway's keep your finger on the trigger and squeeze and if you aren't racing or bashing then ask your-self WHY???

(in reply to Nightshift)
       Post #: 77

RE: A123Racing Battery Questions - 11/21/2006 4:07:36 PM   
A123 Racing


 

Posts: 101
Joined: 8/25/2006
From: Hopkinton, MA, USA
Status: offline 		Hey Totally Losi,

The batteries do have different dimensions. The 2S1P is 153mm x 28mm Dia, and the 2S2P is 153mm x 28mm x 53mm. I have the xxx-T and the 2S1P fits pretty well. I do have to bend the strap down bar pretty good to get it to latch but with some muscle I can get it in with no mods. The 2S2P is another story, this battery is wider than the battery tray so you would need to do a little modification to your chassis to get it to fit.

If you are into racing I would recommend the 2S1P anyway. It is lighter and provides plenty of power for a race (8-10 minutes)

Please let me know if you have any other questions.

OCR99

Sorry you cannot charge the batteries in parallel on the charger. The balance ports on either battery would have to be plugged in and the charger does not support this.

Brian



(in reply to totally losi)
       Post #: 78

RE: A123Racing Battery Questions - 11/21/2006 7:00:40 PM   
sonsight


 

Posts: 35
Joined: 7/24/2003
From: Divide, CO,
Status: offline 		Hello again Brian.
I'm the fellow who inquired about your packs in a sailplane. I didn't see a 4S pack on your site. Would using your HS-SK-2S2P-2
product do the trick? Series or in parallel? Also, what voltage should I program my ESC to cut off?
Thanks again!
Jake

(in reply to A123 Racing)
       Post #: 79

RE: A123Racing Battery Questions - 11/21/2006 10:14:10 PM   
SS Pede



Posts: 306
Joined: 2/2/2006
From: Reading, MA, USA
Status: offline 		Hey Brian, is there any possibility of having Powerpole (Sermos 30 amp) plugs installed on the battery/charger/turbo box when ordered? I like Powerpoles and I'd naturally want to avoid having to do the conversion myself. I think I heard this would void the warranty or something, but I thought I'd ask anyways just in case.

Thanks again for your time!

(in reply to sonsight)
       Post #: 80

RE: A123Racing Battery Questions - 11/22/2006 3:55:08 PM   
A123 Racing


 

Posts: 101
Joined: 8/25/2006
From: Hopkinton, MA, USA
Status: offline
Hello Sonsight

Yes the 2S1P starter kit would work very well just wire the batteries in series during flight. You can set your esc to 2.0V or if that is not an option you can simply turn it off. Our batteries are not damaged if they are brought to low. You don't want them to go below 1.0V / cell or the charger will have a difficult time with it. It would be extremely difficult for you to bring them down lower than this during use.

Hello Pede,

Unfortunately we cannot apply the power poles for you. If we began to customize packs we would quickly have far to many to do them time would allow. Can you make a Deans to power poles adapter to test the batteries, to make sure you do not need a return (I do not expect any problems but you should check for yourself to be sure) and then once you have confirmed for yourself they are working well then you can make the modification yourself, or simply continue to use the adapter…

Please let me know if you have any other questions.

Brian



(in reply to SS Pede)
       Post #: 81

RE: A123Racing Battery Questions - 11/23/2006 2:08:29 AM   
sonsight


 

Posts: 35
Joined: 7/24/2003
From: Divide, CO,
Status: offline 		Brian, I want to say just one thing....
THANK YOU FOR THE EXCELLENT CUSTOMER SUPPORT! This goes miles ahead of slick ads. Now I will be able to get my Condor Magic to altitude, without the fear of burning down a national forest, or my home for that matter!
Jake

(in reply to A123 Racing)
       Post #: 82

RE: A123Racing Battery Questions - 11/24/2006 6:08:14 PM   
imjonah


 

Posts: 16
Joined: 9/11/2003
From: longmont, CO, USA
Status: offline 		Question 1
quote:

Hello Lee Jay, We do currently sell our loose cells on our website (www.a123racing.com) you can get four of them for $66. you can also get the balancing wires for these cells to allow you to create custom 2S and 3S packs that can still be used with our charger"


4 for $66 = $16.50 each I beleive. Your sale price for the same thing with balacing wires and deans plug is $49. Assuming most RC car people will be buying a pair that is $33 vs $100.
It seams like a pretty wide gap here in price. For around $40 for a pack that is equivalent in voltage and mah to a NIMH subC pack it would be pointless to tear one of those DeWalt packs apart, for $100 a pack it becomes a viabnle option.

Question 2 I am still uncertain about your answer to using other chargers besides the one you offer.
Let me phrase the question a bit differently, If I am willing to monitor the charging process carefully watching the relevent variables can I use other chargers.
For example contrary to what most people say you can use and decent NICAD charger to charge NIMH cells, as ling as you use a digital voltmeter and thermometer.

(in reply to ho0joker)
       Post #: 83

RE: A123Racing Battery Questions - 11/24/2006 6:47:59 PM   
everydayflyer



Posts: 856
Joined: 8/21/2005
From: Buchanan, GA, USA
Status: offline
quote:

If I am willing to monitor the charging process carefully watching the relevent variables can I use other chargers.



Hope Brian does not mind me jumping in here.

There are many using A123 cells in pack configurations that are not available from A123 Racing. I am using 3S and 4S packs but some that I am aware of are using up to 13S packs.

Myself and others use Li-Ion / LiPoly chargers and also NiCad chargers . For the sake of safety I use a LiPoDapter when charging with a Ni charger and also use it with LiPoly charger for convince and safety.

Since a 7cell A123 and a 6S LiPoly charge to the same terminal voltage (25.2V) it is simple enough to use a LiPoly charger set for a 6S pack to charge a 7S A123.

A 9S Lipoly charges to 37.8 volts which would be 3.78 per cell for a 10S A123 which is close enough.
An 11S A123 charged as a 10S could likewise bee only a slight overcharge (3.81 per cell).

A Li charger with Li-Ion (3.6 / 4.1 V ) settings can get even closer on some combos.
10*4.1=41/11=3.72

A 3 cell A123 being charged on AF-109 ,charge tapered and terminated by hand.

Added a second Graph showing same 3 cell charged at 6.1A with LiPoDapter terminating charge..







Attachments
Click to see fullsize image.
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< Message edited by everydayflyer -- 11/24/2006 10:07:03 PM >

(in reply to imjonah)
       Post #: 84

RE: A123Racing Battery Questions - 11/26/2006 5:53:52 PM   
Airbike


 

Posts: 596
Joined: 3/18/2003
From: Walnut, CA, USA
Status: offline 		Hi Brian,

I just read thru this thread and a couple of others and did not see it addressed, but has anyone posted on their experience using the A123 2S pack for a receiver and servo power application? Specifically for giant scale aerobats with 9-14 high power digital servos.

I would be comparing the 2S 2300 pack to say a Fromeco Li-ion 2S 2400 + regulator.

Since the M1 2S pack is only at 7.2v fully charged, I would not have to run a regulator. (There are people running 2S Li-po without regulators so the Rx and servos will take the higher voltage).

Dan

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(in reply to everydayflyer)
       Post #: 85

RE: A123Racing Battery Questions - 12/5/2006 5:28:43 AM   
SS Pede



Posts: 306
Joined: 2/2/2006
From: Reading, MA, USA
Status: offline 		So I heard a rumor that A123 was testing some cells for the 1/18th scale market. Interesting... But such cells might be too small/low capacity to use in 1/10th vehicles. I wonder if these will really come out. If they do, there's no excuse for not making a more standard sized cell for the 1/10th community! Anyways I'm glad to see A123 maybe branching out.

(in reply to jjackstone)
       Post #: 86

RE: A123Racing Battery Questions - 12/6/2006 5:44:18 PM   
Waterlogged


 

Posts: 156
Joined: 10/2/2006
From: Eugene, OR, USA
Status: offline 		I would like to see a D-cell package for us 150A boat guys. -WL

(in reply to OCR99)
       Post #: 87

RE: A123Racing Battery Questions - 12/7/2006 10:21:33 PM   
calvinwill


 

Posts: 110
Joined: 3/9/2006
From: San Francisco, CA, USA
Status: offline 		Will you make in the near future batteries the same size as current nimh/nicads? I would not mind a little less power to get 15 to 30 minute recharge times. This is what I have been looking for in RC hobby, updated battery technology. I have a couple of RC cars, trucks and two Tamiya Leopard A6 tanks and I would love to dump the current nimh/nicad batteries and chargers and replace them with 21st century battery tech.

Calvinwill

(in reply to A123 Racing)
       Post #: 88

RE: A123Racing Battery Questions - 12/13/2006 10:19:22 PM   
A123 Racing


 

Posts: 101
Joined: 8/25/2006
From: Hopkinton, MA, USA
Status: offline 		So we were spotted testing some batteries in our 18th scale trucks. I can’t say what we are working on except; we are always in development looking for the next best thing, and we do know that our current battery packs do not fit in every single 1/10th scale vehicle.

Please let me know if you have more questions.

Brian



(in reply to calvinwill)
       Post #: 89

RE: A123Racing Battery Questions - 12/14/2006 7:47:21 PM   
SS Pede



Posts: 306
Joined: 2/2/2006
From: Reading, MA, USA
Status: