New 1100 mAh A123 available everywhere and no word here!  
View related threads: (in this forum | in all forums)

Tower Hobbies
Enter up to 4 keywords or Tower stock numbers
Logged in as Guest



Users viewing this topic: none
  Printable Version
       

All Forums >> Radios, Batteries, Clubhouse and more >> Batteries & Chargers >> A123Racing Support >> New 1100 mAh A123 available everywhere and no word here!
Page: [1] 2 3 4 5 6 7   next >   >>  

Login
Message << Older Topic   Newer Topic >>
New 1100 mAh A123 available everywhere and no word here! - 11/7/2007 2:00:35 AM   
everydayflyer



Posts: 854
Joined: 8/21/2005
From: Buchanan, GA, USA
Status: offline 		So the new 1100 mAh cells are available at HomeDePot,E bay ,Amazon etc. and there are at least 3 thread on RC Groups but no word here on the Official A123 Racing website.
Sure is a strange marketing strategy IMO.

http://www.rcgroups.com/forums/showthread.php?t=768455

Known as Black & Decker VPX .


Graphs of a 3S and a single cell

My weights:

2cell pack as purchased 123 gr. / 4.34 oz.

1 cell with 2 1/2" 14 ga. leads and APP connectors 48.6 gr. / 1.71 oz.

3S pack with 6" 14 ga. leads APP connector and PQ balancing leads. 137.7 gr. / 4.86oz.


Cells are .715" dia X 2.535 long , not counting tabs.





Charles

Attachments
Click to see fullsize image.
Click for fullsize 		Click to see fullsize image.
Click for fullsize


< Message edited by everydayflyer -- 11/8/2007 12:11:23 AM >
       Post #: 1

RE: New 1100 mAh A123 available everywhere and no word... - 11/7/2007 2:42:33 AM   
SS Pede



Posts: 306
Joined: 2/2/2006
From: Reading, MA, USA
Status: offline 		Strange marketing strategy indeed. Though we must admit that RC is not really A123's biggest thing going right now. Still...the sooner I know the details about these packs, the sooner I can look into potentially purchasing them.

I am curious about how much power these cells can provide compared to M1's. Are they still suitable for 1/10th scale brushless land vehicles?

< Message edited by SS Pede -- 11/7/2007 2:48:56 AM >

(in reply to everydayflyer)
       Post #: 2

RE: New 1100 mAh A123 available everywhere and no word... - 11/7/2007 3:04:06 AM   
everydayflyer



Posts: 854
Joined: 8/21/2005
From: Buchanan, GA, USA
Status: offline
quote:

Strange marketing strategy indeed. Though we must admit that RC is not really A123's biggest thing going right now.


I know but this is their Official Support Forum after all.

Plenty of detail on the other site.

quote:

Originally Posted by sjslhill
We have the 18650 cells

The capacity at 1C discharge to 2.0V ranged from 963-1005 mA-h

Capacity at ~15C discharge to 2.0V is ~ 950mA-h with ~2.725 avg V.

AC impedance is 15-16 mohm

Effective DC internal resistance @ 50% SOC ranged from 36-39 mohm

The resistance numbers predict reasonable voltage performance in burst applications up to ~25A.

Calculated peak power at room temperature is ~42A.

thanks,
Steve
www.battlepack.com

Charles

< Message edited by everydayflyer -- 11/7/2007 3:14:48 AM >

(in reply to SS Pede)
       Post #: 3

RE: New 1100 mAh A123 available everywhere and no word... - 11/7/2007 5:36:54 AM   
SS Pede



Posts: 306
Joined: 2/2/2006
From: Reading, MA, USA
Status: offline 		Sorry, I can't make much sense out of those numbers in terms of how my truck (Stampede) would perform (assuming I got the 2s2p pack). 25 amps from how many cells? Put it this way: do you think they'd work better, same, or worse in your Rustler compared to your M1's that you've mentioned on here?

(in reply to everydayflyer)
       Post #: 4

RE: New 1100 mAh A123 available everywhere and no word... - 11/7/2007 12:54:41 PM   
everydayflyer



Posts: 854
Joined: 8/21/2005
From: Buchanan, GA, USA
Status: offline 		Parallel they would be about the same 2200 mAh Vr/ 2300 mAh.

Their advantage is smaller size .less weight.

Would you rather use a 6C 2400 mAh Nicad or a 6C2P 2400 Ni made up of paralledl 1200 cells or perhaps a set of 3S 2400s used in series (saddle packs) would be best.


Charles

(in reply to SS Pede)
       Post #: 5

RE: New 1100 mAh A123 available everywhere and no word... - 11/7/2007 3:38:35 PM   
SS Pede



Posts: 306
Joined: 2/2/2006
From: Reading, MA, USA
Status: offline 		Thanks. Looking forward to some user reviews of these cells.

(in reply to everydayflyer)
       Post #: 6

RE: New 1100 mAh A123 available everywhere and no word... - 11/9/2007 8:37:32 PM   
Red Scholefield



Posts: 4624
Joined: 12/8/2001
From: Newberry, FL, USA
Status: offline 		I just picked up a Black & Decker VPX pack at Lowes. $19.97 for two cells in a plastic pack that is easy to dissassemble, just pry up the tabs on the connector end and remove that assembly pulling the cells out of the plastic shell.

These are marked A123 18650 and weigh 40 grams each. A discharge after charging to 7.2 volts with an Xtrema charger they gave 950 mA @ 1.3 amps discharge. Two cycles were run, no change in delivered capacity.

Under the paper sleeve is a normal heat shrink sleeve. I'm going to make up a 4S pack and see how it performs on an AXI 2208/34 with 10 X 5 APC-E prop.

One rather strange thing. The can is negative while the button is positive, just the oposite of the A123 2300 mAh cells we have been using.


Attachments
Click to see fullsize image.
Click for fullsize 		Click to see fullsize image.
Click for fullsize 		Click to see fullsize image.
Click for fullsize 		Click to see fullsize image.
Click for fullsize


< Message edited by Red Scholefield -- 11/9/2007 8:41:15 PM >

_____________________________

Red S. AMA 951
R/C Battery Clinic
www.rcbatteryclinic.com

(in reply to SS Pede)
       Post #: 7

RE: New 1100 mAh A123 available everywhere and no word... - 11/9/2007 8:41:54 PM   
Red Scholefield



Posts: 4624
Joined: 12/8/2001
From: Newberry, FL, USA
Status: offline 		duplicate post

< Message edited by Red Scholefield -- 11/10/2007 12:37:34 AM >

_____________________________

Red S. AMA 951
R/C Battery Clinic
www.rcbatteryclinic.com

(in reply to Red Scholefield)
       Post #: 8

RE: New 1100 mAh A123 available everywhere and no word... - 11/9/2007 11:37:27 PM   
flipflop


 

Posts: 418
Joined: 12/25/2001
From: Naples, TX, USA
Status: offline 		I picked up two of the VPX packs at Wal-Mart yesterday and went ahead and ordered a CellPro from FMA. I'm primarily planning on running them as 2 cell RX packs. Just wondering, until the CellPro gets here, can I go ahead and build my packs and charge them on a normal nicad/nimh charger if I monitor the voltage and stop at 7.2???

Thanks

(in reply to Red Scholefield)
       Post #: 9

RE: New 1100 mAh A123 available everywhere and no word... - 11/10/2007 12:38:40 AM   
Red Scholefield



Posts: 4624
Joined: 12/8/2001
From: Newberry, FL, USA
Status: offline
quote:

ORIGINAL: flipflop

I picked up two of the VPX packs at Wal-Mart yesterday and went ahead and ordered a CellPro from FMA. I'm primarily planning on running them as 2 cell RX packs. Just wondering, until the CellPro gets here, can I go ahead and build my packs and charge them on a normal nicad/nimh charger if I monitor the voltage and stop at 7.2???

Thanks


That should work, just make sure you are monitoring the voltage and shut it down at 7.2 volts.

_____________________________

Red S. AMA 951
R/C Battery Clinic
www.rcbatteryclinic.com

(in reply to flipflop)
       Post #: 10

RE: New 1100 mAh A123 available everywhere and no word... - 11/10/2007 12:57:02 AM   
flipflop


 

Posts: 418
Joined: 12/25/2001
From: Naples, TX, USA
Status: offline 		ALLRIGHT!!! Gotta go plug the soldering iron in. I think for the initial test I'll put a deans plug on there so I can see how they perform with the Wattmeter.

Thanks a lot

< Message edited by flipflop -- 11/10/2007 11:57:10 PM >

(in reply to Red Scholefield)
       Post #: 11

RE: New 1100 mAh A123 available everywhere and no word... - 11/10/2007 5:40:25 PM   
dragon_no_fly


 

Posts: 140
Joined: 5/29/2005
From: , USA
Status: offline 		How fast are you guys charging them at? 5 Amps? Anyone try charging these new "A123" cells at up
to the M1 rate of 10 Amps? That would be very interesting, a theoretical 6.6 minute re-charge time.
I have seen zip charging on the M1 cells listed here which is extremely impressive. A123 NEEDs to
make an official comment on these new 1,100 mAh cells ASAP to dispel any disbelief in them that
they may not actually contain A123's patented nano lithium phosphate material. Assuming that they
actually are from A123 (probably manufactured in China) I can not imagine how they would have
any safety issues beyond what the original, well proven M1 cells have. I and I am sure a tonne other
flyers have been waiting for these cells for quite some time. I really hope they are TRUE A123 cells,
if so, good bye, good riddance to LiPO packs on my helis with all of their annoying safety issues!

(in reply to flipflop)
       Post #: 12

RE: New 1100 mAh A123 available everywhere and no word... - 11/10/2007 6:07:30 PM   
everydayflyer



Posts: 854
Joined: 8/21/2005
From: Buchanan, GA, USA
Status: offline 		My first attachment shows them charged at 5A for all testing.

Yes they are official A123 tecnology ,the real deal.


I have charged a 4S pack at 10 amps. which equaly 9C.

Charles

< Message edited by everydayflyer -- 11/10/2007 6:09:44 PM >

(in reply to dragon_no_fly)
       Post #: 13

RE: New 1100 mAh A123 available everywhere and no word... - 11/10/2007 7:14:22 PM