RE: A123 pack life in real world uses?  
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All Forums >> Radios, Batteries, Clubhouse and more >> Batteries & Chargers >> A123Racing Support >> RE: A123 pack life in real world uses?
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RE: A123 pack life in real world uses? - 4/22/2008 11:29:22 AM   
everydayflyer



Posts: 892
Joined: 8/21/2005
From: Buchanan, GA, USA
Status: offline 		Red I have a 4S pack which I charged to 18.25 (4.5625 volts per cell) after flight 44. Well approx. 4 months have passed and the pack now has 240 flights on it and I can tell the capacity is down a little.


I have a 3S which has been charged between 15 and 20 amp. averages (6-8 min.) and it shows signs of losing capacity also, however it does have 443 flights on it.


Charles

< Message edited by everydayflyer -- 4/22/2008 11:30:24 AM >

(in reply to Red Scholefield)
       Post #: 51

RE: A123 pack life in real world uses? - 4/22/2008 1:49:54 PM   
Red Scholefield



Posts: 4768
Joined: 12/8/2001
From: Newberry, FL, USA
Status: offline 		I guess everything has its limits, but I think we are all in agreement that A123 technology is far ahead of LiPos in the reliability, durability and cycle life department.

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Red S.
AMA 951 Leader Member

(in reply to everydayflyer)
       Post #: 52

RE: A123 pack life in real world uses? - 4/22/2008 9:08:25 PM   
SS Pede



Posts: 320
Joined: 2/2/2006
From: Reading, MA, USA
Status: offline 		I'd have to agree with you Red. Also, I don't mind capacity loss as much as performance loss. I'll deal with slightly shorter run times after 300+ runs if the power output is still pretty good.

Does anyone have any thoughts on "effective" capacity of these cells versus LiPo and/or NiMH? A123 claims a 2300 mAh pack will run as long as a 3300+ mAh NiMH pack. I know A123 cells are light, with low internal resistance, but are these claims overblown? What sort of run time have people observed compared to similar capacity cells of different chemistries?

(in reply to Red Scholefield)
       Post #: 53

RE: A123 pack life in real world uses? - 4/23/2008 12:43:46 AM   
Red Scholefield



Posts: 4768
Joined: 12/8/2001
From: Newberry, FL, USA
Status: offline 		I think the claim that A123 2300 will run longer than a 3300 Ni-Mh is stretching it more than a little bit.

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Red S.
AMA 951 Leader Member

(in reply to SS Pede)
       Post #: 54

RE: A123 pack life in real world uses? - 4/25/2008 5:22:08 AM   
andy38


 

Posts: 24
Joined: 11/7/2004
From: edmond, OK, USA
Status: offline 		I have a hxt-63-64b motor,sentilion-100amp hv speed control,2 6s1p a123 packs in series for 12s1p in a e-coverted 4*60.
Two 6s1p packs just fit where the tank was,tank floor still in pace,hatch in top of fuse.Duration is 6-7 minets with alot of full
power used, amp draw 35-40amps, bateries are only warm. I flew this plane for years with a OS91fX,even though it is heavier
it is more than a mach for the OS I think the larger 18-12 prop helps the perfomance alot.

(in reply to Red Scholefield)
       Post #: 55

RE: A123 pack life in real world uses? - 4/25/2008 11:52:02 PM   
everydayflyer



Posts: 892
Joined: 8/21/2005
From: Buchanan, GA, USA
Status: offline
quote:

ORIGINAL: SS Pede

I'd have to agree with you Red. Also, I don't mind capacity loss as much as performance loss. I'll deal with slightly shorter run times after 300+ runs if the power output is still pretty good.

Does anyone have any thoughts on "effective" capacity of these cells versus LiPo and/or NiMH? A123 claims a 2300 mAh pack will run as long as a 3300+ mAh NiMH pack. I know A123 cells are light, with low internal resistance, but are these claims overblown? What sort of run time have people observed compared to similar capacity cells of different chemistries?


Myu gues is that A123Racing was making the comparison in RC surface vechiles. My traxxas Rustler runs longer on a 3S A123 the it did on a 6 cell NiMh 3300 or a 7cell Ni Cd 2400. the A123s are lighter and maintain volts under load better.

A Astro Flight Cobal 15 powered plane which I use to fly on 8-10 cell NiCds 1200-1500 mAh that was difficult to gey 3 min. acro batic flights with get good solit 7 min. flights with a 4S A123.



Charles

(in reply to SS Pede)
       Post #: 56

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