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Old 02-11-2009, 06:30 PM   #1
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just wondering if any has any info on a123 tech.I want run the a123 4600 packs in my mf2 this season.How do compare to lipos.thanks
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Old 02-11-2009, 06:41 PM   #2
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Use a 2s 4p 1100 a123 brick instead. The 2s 2p 2300 pack will be too wide for the mf2. A 2s 4p 1100 pack will fit & then you can zip tie it into the car. A 2s 4p pack will give you 6.6volt 4400mah. You should get close to 20 minutes of run time & then the super fast charge times. A123s if treated properly will get on avg. over 300 more cycles, charge in 1/4th the time, & perform astonishingly well. They weigh more, but if you aren't running li//bl pro truck & looking to make 45 minute mains on one pack then you shouldn't have any worries.
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Old 02-11-2009, 06:47 PM   #3
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Party.. Do you run stock or modified with your A123s?

There is only one guy at our local track that runs them, but he is a novice.. sort of hard to tell how good the batteries are.. I am interested in them, but they are a full volt+ less than NiMh and LiPo packs I am currently running. I run stock 2wd buggy... and you also say they weigh more..

Besides the fact they are easier to maintain... run.. etc... What is the real advantage?


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Old 02-11-2009, 07:43 PM   #4
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can I use the 4600 with a little modifiction.II'l be using speed passion esc with a 9.5 motor .Will 9.5 have to much power.Are track has lots of tight turnes and only one long straight away..
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Old 02-12-2009, 07:23 AM   #5
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Quote:
Originally Posted by JeromeK99 View Post
Party.. Do you run stock or modified with your A123s?

There is only one guy at our local track that runs them, but he is a novice.. sort of hard to tell how good the batteries are.. I am interested in them, but they are a full volt+ less than NiMh and LiPo packs I am currently running. I run stock 2wd buggy... and you also say they weigh more..

Besides the fact they are easier to maintain... run.. etc... What is the real advantage?


Jerome
you only need 2 batts, they charge in 15min, and run for 20+. cheap($55 for a 4600) noob proof, they don't catch on fire, swell, etc. 300+cycles.


they do have a lower voltage, but you just go to the next lower turn motor and it makes up for it, or you could gear it the moon


crappy CS since they went to the enerland brand though...
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Old 02-12-2009, 08:08 AM   #6
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Stay away from A123 if you can. You really can't charge faster than the newer lipos and you can't even discharge higher than the newer lipos too. The only benefit to A123 is that they have a safer technology. The A123 battery has a lot of cons, it has a lower voltage which means it won't run well in stock class, it doesn't fit right in standard battery trays, and they are expensive and A123 has poor customer service (non-existant). So hope you don't get bum batteries or charger.
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Old 02-12-2009, 08:16 AM   #7
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this is probably the battery you would want that is setup as a standard 1/10 sized pack:

http://www.rclipos.com/AR18650-2S2P.htm

Specifications:
6.6V 2200mAh
30C (66.0A) cont
60C (132.0A) burst
136mm x 45mm x 22mm
190 grams
Deans Connector
PolyQuest tap


Its too bad its not a 4400mah pack or something more.

What kind of runtimes do you need?
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Old 02-12-2009, 09:09 AM   #8
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I built a 2s 3p pack & used it in my li//bl pro truck & a 2s 1p pack in my 4wheeler. It ran great & easily made the 20 minutes, more like 35 minutes of run time w/ a 6.5. The cells are noob proof, they belong in the pit of the guy who tries to put out cigarets with his pit rag after he cleans up a nitro spill. They also get alot more cycles then lipos do.


XXX-T Fit-
You can make the pack fit, but it is very tough to do. You have to get both battery walls shaved down very low. I used them to run li//bl pro truck. I built a 2s 3p pack that performed very well. Odds are your boing to have tons of trouble using a battery strap at all so use the area where the servo wire is suposed to run & stick a huge zip tie through it to hold the batteries in place. It would also be easier to start w/ a xxx-T CR chassis since the battery walls are wider apart.
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Old 02-12-2009, 09:53 AM   #9
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I've been running the 2300's and 1100's for a couple years now and I couldn't be more happy, a few of the 2300 packs have over 400 cycles and I can't tell any difference between those and one's with 100 cycles. With a little playing you can get them to fit in anything, I'm 100% A-123 now and never plan on buying a lipo again.......BB
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Old 02-12-2009, 09:58 AM   #10
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Quote:
Originally Posted by mattnin View Post
Stay away from A123 if you can. You really can't charge faster than the newer lipos and you can't even discharge higher than the newer lipos too. The only benefit to A123 is that they have a safer technology. The A123 battery has a lot of cons, it has a lower voltage which means it won't run well in stock class, it doesn't fit right in standard battery trays, and they are expensive and A123 has poor customer service (non-existant). So hope you don't get bum batteries or charger.
Have you run 123's?

You really can't charge faster than the newer lipos and you can't even discharge higher than the newer lipos too.
What? This statement is a lie...
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Old 02-12-2009, 11:11 AM   #11
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Quote:
Originally Posted by whitrzac View Post
you only need 2 batts, they charge in 15min, and run for 20+. cheap($55 for a 4600) noob proof, they don't catch on fire, swell, etc. 300+cycles.


they do have a lower voltage, but you just go to the next lower turn motor and it makes up for it, or you could gear it the moon


crappy CS since they went to the enerland brand though...
Well... in stock 1/10 scale racing, battery voltage is EVERYTHING... gearing will not make up for lack of power. I think I will stick to my LiPos and even NiMh before these. I race 2 classes with 2 LiPos...

I understand the safety factor.. but this is not really a problem. Most of these concerns come from a few years back when LiPos were new on the scene. Mosly from the r/c air guys using soft packs. We use hardcased packs. Our crashes arent as violent as a plane going down. People and chargers were also new to the technology. At our local track we have been racing with LiPos for over a year now with 75% of the racers using them. Not a single problem that involved a LiPo blowing up on the track or charger. LiPo chargers are up to par now...

Maybe the next gen of whatever A123s evolve into...

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Old 02-12-2009, 11:15 AM   #12
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Quote:
Originally Posted by mattnin View Post
Stay away from A123 if you can. You really can't charge faster than the newer lipos and you can't even discharge higher than the newer lipos too. The only benefit to A123 is that they have a safer technology. The A123 battery has a lot of cons, it has a lower voltage which means it won't run well in stock class, it doesn't fit right in standard battery trays, and they are expensive and A123 has poor customer service (non-existant). So hope you don't get bum batteries or charger.

WTF are you talking about??? I would love to see you try to charge a lipo in 10-15min, be sure to have a camra ready

there cheap
http://cgi.ebay.com/A123-6-6V-4600-L...3%3A1|294%3A50

the discharge rate of a $55 a123 pack is = to a $140 lipo

you are right about there non existant CS though...
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Old 02-12-2009, 12:13 PM   #13
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I still own many A123 packs. I wouldn't be knocking these batteries if I didn't already own them and use them myself. As matter of fact, I still use 1100mah A123 cells in my rock crawler. I have used A123 in touring car, and A123 in modified offroad racing but I have since stopped using them because of the hassle dealing with them. Hardly any battery tray fits these batteries, and forget about using A123 if you race stock.

And there are LIPO batteries out now rated at 10A or more charge current. That is just as fast as the A123 charger. So yes, you can charge a LIPO battery pretty darn fast.

A123 doesn't discharge better than 30C. And there are LIPO batteries out now like the Reedy that discharge at 35C, and tested. If you want, I can pull up some tests from rcgroups. Yes, the A123 does discharge high, but it isn't as good as some of the newer LIPOs out right now.

I take that back if the price is a 2600mah is only $50 though, that isn't a bad price at all. But for the total cost of A123, you must also factor in the special charger.

A123s aren't ROAR approved either. There are a lot of cons about the A123 batteries, more than LIPOs in my humble opinion.
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Old 02-12-2009, 12:17 PM   #14
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can I use a123 4600 packs with a novak gtx/tekin 411.I'm not worried about low voltage,my two sons are begginers.thier will be running stock class.they don't lot's of power to start out.
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Old 02-12-2009, 12:19 PM   #15
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A123 with brushed motors is even worse! At least with a A123 and brushless, you can gear higher, not so with a brushed motor. Those motors will overheat faster than a brushless would. A123 and mod class is ok, you can be just as fast, but with A123 and stock, you are at a major disadvantage. You are pulling much more current, and current is the killer. Voltage is everything in stock. They will be slow. But yea, they will work.
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