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HomeAircraftHelicopterHelicopter Main Discussion › are a123 batteries too good to be true?
04-03-2009 06:05 PM  9 years agoPost 1
guitar123

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alaska

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i just got in to this hobby a month ago and ordered everything i need to put a beam together. I went with lipos cause I thought that was the "norm"
,but i'd like too get the "a-123" batteries too.
what do I need to use these batts and where do i get them?
-can i use 30amp powerpole connectors?
-do I need a different ESC(i have a scorpion 45a)?
-will my hyperion duo II charger work for these batts?
-what else do i need to know?

thanks
mike

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04-03-2009 06:09 PM  9 years agoPost 2
flustercluck

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Newnan Ga (Just S. of ATL)

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-what else do i need to know?
I'm not the expert, but I believe 123's lack the power density of LiPo. However, there's probably no chance of explosion or fire.

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04-03-2009 06:11 PM  9 years agoPost 3
copperclad

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NY

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Hi Mike
what size is your Beam , i could be mistaken , but i believe the A123's are for machines 500 and up , due to thier larger form factor , HTH

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04-03-2009 06:22 PM  9 years agoPost 4
Anthony.L

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Seattle, WA

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i could be mistaken , but i believe the A123's are for machines 500 and up , due to thier larger form factor
Not the case, they are larger then lipo but will fit on a 450 size heli.

Do a Google search for "a123 battery trex 450" and see all the links you will find here on RR and HeliFreak about people running them.

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04-03-2009 06:24 PM  9 years agoPost 5
Anthony.L

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Seattle, WA

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-can i use 30amp powerpole connectors?
Yes, you can use any connector type you want.
-do I need a different ESC(i have a scorpion 45a)?
No, A123 will work fine with that ESC.
-will my hyperion duo II charger work for these batts?
Yes, the Hyperion has an A123 charge mode for up to 6 cells.

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04-03-2009 06:25 PM  9 years agoPost 6
copperclad

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NY

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thanks Anthony
i had been doing searches and reading up on them , for about a month now , and didn't recall seeing any posts on machines smaller than 500's , of coarse with my old mind , that is not saying much , thanks again

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04-03-2009 06:34 PM  9 years agoPost 7
TJinGuy

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Socorro, NM - USA

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A123 cells are big and round, they just don't fit very well anywhere. They also have a lower nominal voltage so you will be in between cell counts. Yes you can charge them fast, yes you can charge them a lot of times with less deterioration, and yes they don't catch fire when you poke holes in them but that is easily offset by the added energy density, cheaper cost and more reasonable physical size and shape.

- Chris

Team New Mexico
TJinTech

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04-03-2009 06:36 PM  9 years agoPost 8
guitar123

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alaska

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thanks
there is a post on e-beam some guy is using a123, im just waiting for his reply on what esc i need. he has a picture of it all hooked up and he sais it work sweet.
if i use power pole connectors what amp should i go with?
i should just need a different esc right? and then just plop that bad boy on my beam and fly away ya?

beams are 450 size

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04-03-2009 06:37 PM  9 years agoPost 9
TJinGuy

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Socorro, NM - USA

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You don't need a different esc.

- Chris

Team New Mexico
TJinTech

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04-03-2009 06:42 PM  9 years agoPost 10
guitar123

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alaska

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now that sounds all too good too be true, well i just hope it wont start my esc on fire.
what amperage of powerpole connectors should i get?

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04-03-2009 09:59 PM  9 years agoPost 11
asm

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California

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I have been monitoring A123 technology since it was first available couple of years ago, and so far, at least to me, it's nothing but disappointment. So, I'm not sure what you mean by too good to be true.

Let's point out many of A123's short coming.

1. Heavier then lipo
2. Lower Voltage then lipo
3. More expensive then lipo
($321.30 for a a123 pack that would fly 600e vs. One of the best performing lipo Outrage XP25 at $240).
4. Round shape leave unusued space when pack is built.

Granted, A123 will probably work in large scale planker where wieght does not matter much. In heli, every oz you add to the aircraft reduce its performance and therefore, more power is needed to make up the difference and which lead to more weight...

If the price is comparable or cheaper then lipo, I may have considered, but higher price and lower performance?? No thank you.

B

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04-03-2009 11:57 PM  9 years agoPost 12
mmc205

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PA - USA

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you may need a different esc if you esc uses auto lipo cutoff as cutoff for a123's should be about 2.0 volts /cell. most auto lipo cutoff escs will cut at 3.0 volts per cell which is still well into the useful voltage rang of an a123. they only start out at 3.6 volts per cell and sag under load to 2.6-3.0 depending on current draw. basically you need 4 a123's to match the voltage of a good 3S lipo.

***Logo 600 vbar***Henseleit TDR vbar***

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04-03-2009 11:59 PM  9 years agoPost 13
mmc205

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PA - USA

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also, a 6S a123 can be bought at bp hobbies for $100. 2 in series would run a trex 600 and 1S is good for a trex 500. that woudl only be $200 with a 500+ cycle life, way cheaper than lipos, not to mention the fact that you can charge them in 15 minutes (some are charging in less than 5 minutes)

***Logo 600 vbar***Henseleit TDR vbar***

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04-04-2009 12:08 AM  9 years agoPost 14
dave75d

rrKey Veteran

Jacksonville, FL

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i hope you're right. i just ordered from bp hobbies, based on your recommendation, got 2, so im going to put it to the test when they get here. ive already got 2 6s lipos, so this should be interesting.

also, 2 were only $197, thats just over what i paid for 1 tp 2600mah.

ten grand in helis and all i can do is hover

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04-04-2009 12:11 AM  9 years agoPost 15
mharpo

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Louisville, KY

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yes,..

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04-04-2009 12:13 AM  9 years agoPost 16
TJinGuy

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Socorro, NM - USA

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I refuse to buy into new technologies that if they take off, will be 1/2 or even 1/4 the cost in the not-so-distant future. I just wait until they prove that they are going to stick around and are plentiful, then I will make the move. But hey that is just me keeping a cap on my spending.

- Chris

Team New Mexico
TJinTech

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04-04-2009 12:19 AM  9 years agoPost 17
mharpo

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Louisville, KY

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And, then, when you but your latest and greatest "new" techonology, within a few months, it is old technolgy...

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04-04-2009 12:23 AM  9 years agoPost 18
TJinGuy

rrProfessor

Socorro, NM - USA

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Na lipos have been around for a couple years now and are not going anywhere for at least another year or two. I can live with that.

- Chris

Team New Mexico
TJinTech

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04-04-2009 12:26 AM  9 years agoPost 19
mharpo

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Louisville, KY

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I sounded dumber than you!!

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04-04-2009 07:10 AM  9 years agoPost 20
guitar123

rrNovice

alaska

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i ment too good to be true because of what I read on the beam forum. the charge times were really short.
but i think i now understand his buddy built this battery for his beam.
i'll stick to lipos until i know for sure if 123 is really the way to go?
thanks
mike

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HomeAircraftHelicopterHelicopter Main Discussion › are a123 batteries too good to be true?
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