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Old 12-15-2008, 03:27 PM   #16
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Default xl5 wrong

yes I was wrong on the xl5 only

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Old 12-15-2008, 06:10 PM   #17
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Yo, TNT, My sons and many other kids read this thread. Thanks
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Old 12-16-2008, 11:52 AM   #18
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Thanks for the edit TNT.
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Old 12-16-2008, 01:51 PM   #19
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and happy holidays to you as well TNT.
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Old 12-16-2008, 01:54 PM   #20
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Big Jim you may want to edit your post now.
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Old 12-16-2008, 02:06 PM   #21
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husker-----lol
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Old 12-18-2008, 01:26 PM   #22
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Ok guys...so I think I would like to get a lipo at some point fairly soon. I have learned alot so far by replies here and searching other threads, retailers and manufacturers sites.

One thing I dont really understand is the "C" rating. What exactly does that mean?

One thing I have noticed is the broad range of prices between different manufacturers for virtually the same specs. Not sure if you are paying for a name or what. Any recommendations?

Thanks!
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Old 12-18-2008, 01:44 PM   #23
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Good vendor is SMC for Lipos - ratings tend to be "real" performance numbers vs. "hyped" by some others.
http://www.smc-racing.com/ (note: their enerG prices seem higher than others selling the same batts).

C rating is based on the output discharge possible with the battery.
It is a multiplier, really.

10C 3000mAh = 30A discharge rate
25C 5000mAh = 125A discharge rate

There's more to explain, but just multiply the C by the size = the output amps possible with the battery. Some motors will not draw at the possible rating of the battery, so getting a 30C LiPo for a 27T brushed motor really isn't needed. Higher C rates tend to cost a bit more. But if you have a high capacity lower C vs. a lower capacity higher C rating - they may actually have a similar output discharge rate.

20C 4500mAh = 90A
15C 6000mAh = 90A
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Old 01-02-2009, 05:08 PM   #24
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All this info has been very helpful but I have another question. On some of the batteries I have been looking at, mainly SMC and Orion, I notice that some of them say 2S 1P and some say 2S 2P. I take it that the 2S means it is a two cell battery. Correct? What does does it mean by 1P or 2P? Seems to be a significant price difference between the two of them.

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Old 01-02-2009, 05:30 PM   #25
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the track near me is pullin in 2-3 dozen spec slash racers each wk and most of them took the shop owner up on a deal for the yeah racing 4000mah lipos. they fit well, nice solid case, standard connectors (either TRX or convert to deans), balance connector (dont really need it, but its there). and they run hard and long over and over all day. only need 1 for racing oddly enuff.

good luck

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Old 01-02-2009, 05:52 PM   #26
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S = serial, P = parallel

2S1P - 2 cells serial, 1 parallel (2 cells)
2S2P - 2 cells serial, 2 parallel (4 cells)

my wording may be wrong, but that is the basic concept.
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Old 01-02-2009, 06:35 PM   #27
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Oh okay....gotcha! Thanks fellas!
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Old 01-02-2009, 06:47 PM   #28
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I have run two Orion 4800 and one Orion 3200 Lipo for over a year. They were used when I bought them. I never balanced them but this year I bought a balancer just to check them out. None of the three had an out of balance between the cells of more than .001 volts.

I won't run anything but hard cased for safety although it only increases it slightly. I usually run only Orion and Peak Lipos. I did buy an SMC to test since I always liked their NIMH.

I have seen more NIMH batts blow up than Lipos. Only Lipo problem I have seen is a guy forgot to reset his charger and charged a 4800 on NIMH pack swelled but nothing more before he noticed it.
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Old 01-02-2009, 07:08 PM   #29
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Lipo tool... http://www.scriptasylum.com/rc_speed/_lipo.html
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Old 01-03-2009, 01:30 AM   #30
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I can vouch for not having to have a balancer for the Team Orion batteries.

I just check them with a multimeter, if they are out of balance (they were 0.01v different when I bought them) just hook up the charger to one cell (positive on + and negative to the balance port) and charge until you get them exactly the same... I just checked them again like 2 months and a couple dozen runs later and they still show exactly the same on the multimeter...

I use one of the Accucel clone chargers, it was about $50 with the power supply on eBay shipped from HK, haven't had any problems, it has a built in balancer, but I've never used it as I don't have the plug and I haven't taken the effort to make/buy one.
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