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You could take the Doozite 700 drill motor ($14) and run it on 5S A123 and I expect it would be really fast! You could also run this hundreds of cycles, not just 100 at most like many of the LiPoly packs.
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100 cycles for Li-po?
That seems low.
from the FMA website: "A 2s LiPo pack tested at 140° F exceeded 450 cycles."
...and that is if you heat them up to 145 regularly while running.
100 cycles supports your pro Li-on argument though
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Geez, I dunno how many cycles my packs have gone through probably 150+ and they're fine, there are many in the club that have several hundreds of charges on their Li-po packs with no detectable drop in performance.Comment
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Alright... I suppose this is another one I should know to stay away from... but this is again false...
We have guys getting well over 200 cycles from their PolyRC 20C packs.... competitive until the end... They give good evidence before that they are fading, and usually well before any damage occurs if one is paying attention...
If you are going to continue this fight... please do so with data and real examples... from quality products if possible... (we've all heard of the "lesser" Lipo packs failing... you get what you pay for sometimes...)Darin E. Jordan - Renton, WA
"Self-proclaimed skill-less leader in the hobby."Comment
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You correct Darin as always, about everything in R/C boats. I am done, you win. Everyone forget A123 cells.Comment
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Darin sorry I wasent clear in my post. I was making a direct reference to what happens to a thread when this debate pops up. Yet again we have another prime example.Comment
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I used them in my s.v. 27 also in my 29" p-mono and in p-tunnel the a123 batteries charge only to 3.3 volts where the lipos will actually charge to 4.2 volts per cell i used a123 4 cell packs and a123 charger they charge very fast but the fact is rpm = voltage in the p-mono and tunnel they got hot maybe bacause of amp draw and the speed of all boats was way off i normaly use poly r/c 4s5000ma cells and love them . I know everone talks safety when it comes to lipos we have been running them in our club (waveblasters of fl) for the last year and half we have yet to have a problem with them but in the last 3 months we have had 6 nimh packs explode at the club where should we talk safety
I think if you buy good equipment and learn how to use it lippos are the way to go.
also a123 only came in 2 cell and 4 cell when i tested so if you go to 6 cell you are over p voltage. they work well in planes but i don,t think they are ready for boats except for small sport runningComment
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wow 100 cycles thats crazy I keep track of every cycle and how many ma go into each pack I have 4s packs over 200 cycles and still run like new
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Last edited by Darin Jordan; 12-13-2007, 10:43 PM.Darin E. Jordan - Renton, WA
"Self-proclaimed skill-less leader in the hobby."Comment
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Darin E. Jordan - Renton, WA
"Self-proclaimed skill-less leader in the hobby."Comment
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I have been using Lipo's for 6+ years now in E-powered planes and at last count have some 30+ working packs ranging from 300mah to 4000mah. I personally think that 200 cycles is VERY optimistic if you are using the pack anywhere near its rated C. I mostly fly Thunder Power packs and I figure 100 cycles before you lose 20% capacity and that is being charged usually at .5C or less. This may be a case of pushing the packs harder in planes for the fact we are always looking for the lightest possible package. I am pretty good about logging my cycles so this info is out of my note book and not out of my head. I would say if you are getting 200 cycles out of Lipo's then A123's may very well be a good choice for you.
Cheers,
JimComment
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Does anybody used the Thunder power 1010c Charger on A123 pack with no additional upgrades? I'm also interested to try the A123 batt. the fact that the price is < than the lipo with slight difference in their voltage. any info please? Thanx!...Comment
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I built some A123 5s1p packs for my planes and I'm going to try 2 of them in parallel in my Super Vee 27. That will give me 4600ma of run time, 16.5v (still within the SV's stock ESC's voltage range) and way more amps than I need at a weight still lower than conventional batteries. I can charge them with my Super Brain 989 charger in power supply mode along with my Hyperion LBA 10-A123 balancer. They work very well in my plane and I think they have their place in the lipo catagory.
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You must have the upgrade to do A123, it's a different voltage. A123 top charge voltage is 3.6V per cell, not 4.2V!!!!
Yes, I think A123 is an excellent way to go for many boaters.Comment
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You need a A123 charger of some type..what are you using now for LiPoly, some of them offer software upgrades.Comment
If anyone else came to that conclusion based on what I've posted, let me know and I'll publically try to set the record straight... but I think it was pretty clear what I was saying...
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