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Old 11-04-2008, 06:12 AM   #1
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Default Lipo choice!

Well i know this gets raised alot but i am looking at getting 2 of the trakpower 4900 2S lipo packs and the trakpower v-balance.

I have a Swallow 2 AC/DC charger which does lipo charging aswell, just wondering if this combo would work and if there are any cons to what i am looking to buy. The packs will be used for off road and on road, off road in a losi xx4 and onroad in tamiya ta-05. The xx4 will have a venon pro 120A esc and a novak ss 10.5, ta-05 is run in 540 pro class so just your standard 540 motor.

I have never used lipo's before so any help would be much appreciated.

Thanks
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Old 11-04-2008, 09:51 AM   #2
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They work great for me! Love the simplicity of that combo! Talk to Adrian from Bulldawg rc. He is very helpful. www.bulldawgrc.com
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Old 11-04-2008, 11:16 AM   #3
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orion 3800 or trinity 3800's are worth a look at.

30c and 35c dis ratings. Trakpowers are lower i think 15c or 20c but they have alittle higher capacity so the rating is alittle higher then that. The 3800's will have more rip.
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Old 11-04-2008, 11:29 AM   #4
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What's the runtime with a 3800 mah pack in a 2wd buggy with a 7.5-8.5 motor?
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Old 11-04-2008, 11:32 AM   #5
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TrakPowers work great for us. They are rated at 25C continuous, burst of 50C.
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Old 11-04-2008, 11:37 AM   #6
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So you would get faster lap times with the orion 3800 over the trakpower 4900 in both on-road and off-road?
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Old 11-04-2008, 12:13 PM   #7
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Quote:
Originally Posted by CMB21 View Post
So you would get faster lap times with the orion 3800 over the trakpower 4900 in both on-road and off-road?
Probably not for a few reasons. First the 3800 Orion is 30C, which means it can provide 114 amp continuous pull. The 4900 trakpower at 25C can provide a 122.5 amps continuous pull. There's more to a battery than the 'C' rating stamped on it, it's part of the equation to determine what it's capable of not the answer The trakpowers should actually be the one's with more rip and more top end and probably provide a higher avg voltage over a run as well.

Don't get me wrong I'm a big fan of Orion's batteries, some of the best on the market quality wise, but don't let the whole 'C' rating hype get you. How much can a 1/10th scale pull continuous anyway? Considering some peoples speedo's are rated at a maximum of 100A continuous, I'm guessing quite a bit less than that or our electric races would look like nitro cars smoking all over the track

Until very recently I've been running 3200 Orion's @ 20C with a 6.5 BL in a 4wd. I didn't give up any rip to anyone because of my batteries and never pulled my car off with a hot pack either from being pushed too much for it's limits.
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Old 11-04-2008, 12:40 PM   #8
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That makes things interesting but i guess price then becomes a factor. As i live in Australia and the exchange rate is quite shocking atm.

I can get a trakpower 4900 for AU$150 which is about US$104, and these will be coming from inside Aus so shipping is about US$5.

Where as the cheapest i found an orion 3800 was US$80 and shipping is US$20. And with international mail there is also a gamble.

Think i might go with the trakpower 4900
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Old 11-04-2008, 12:57 PM   #9
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From using lipo's for a year the best packs we have found at our track are....

orion 3800's, trinity 3800's, smc 5000's and trakpowers but really only cause they had saddles.

You can't really go wrong.

I am going with smc and trinity next time.
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Old 11-04-2008, 01:24 PM   #10
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i second the vote for orion 3800,have two and i love them..
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Old 11-04-2008, 01:25 PM   #11
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Well if it's a bragging contest, I've been using LiPo's for a year and a half exclusively and owned several different packs and brands. And the worst packs I've ever seen happen to be Trinity packs (their old 4500's)

I'm just messin around a little RB FIVE, so please don't take it personal. If the numbers on the packs are what they advertise, the 4900's @ 25C will actually be better packs than the 3800's @ 30C. But over a 5 to 10 minute run with a 1/10th scale car, I really doubt there will be any noticeable difference between this two high quality packs from top notch companies.

The brand on the pack really makes no difference unless the manufacturer isn't providing accurate ratings of their pack -- which is most likely the case with some manufacturers. If you want to get down to details, the only way to really know is to cycle a pack and pull numbers like we used to do with our NiMh packs. I have done this with several LiPo packs that I've owned and the CheckPoint 4900's (which are I believe they exact same packs as the TrakPower 4900's) are the best I've owned to date. Over a 6 min 35A discharge they have better voltage & lower internal resistance than my Orion's did and those are the numbers that you put down on the track for rip and top end, not the 'C' rating stamped on the case.

All in all, your not likely going to go wrong with any quality LiPo from any of the top tier manufacturers, be it Associated, MaxAmps, Orion, CheckPoint, TrackPower, Trinity (their new one's without the built-in cut-off), SMC, etc., as long as you compare their capabilities accurately. Personally, I'll take a higher capacity pack with a lower 'C' rating any time the constant amp draws are comparable because several things I've seen with lithium technology hint that it lasts longer when smaller percentages of it's capacity are used regularly.
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Old 11-04-2008, 02:12 PM   #12
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Orion 3600 or 3800 are real nice packs . IMO
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Old 11-04-2008, 02:12 PM   #13
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i'd rather something with a kokam cell they seem to be the best in the buis. so anything with kokams seems to be a good idea to me. as long as you have anything with a decent c rateing and a high enough capacity you should be good.
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Old 11-08-2008, 11:17 PM   #14
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Whats everyone's take on the Orion Platinum2 5000 packs?
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Old 11-09-2008, 06:40 AM   #15
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Just a question. What do you think the max amperage draw is for RC?
take 4wd mod offroad the best traction and lowest turn motor what kind of amps do you think this draws?

My question comes from playing with different lipos trying to see if mah or C rating really mattered in offroad.

I know I only run 2wd truck but here is my setup.
Factory Team T4 with the Tekin R1 and the 537 BL motor(5T).
These are the lipos I have ran in the truck......
Orion 3200 Carbon 20C 64 amps
Orion 4800 platinum 15C 72 amps
Maxamps 5000 20C 100 amps
TrueRC 4000 15C 60 amps
prices range from 140-55
I know that burst amp draw would be higher and all the companys rate their packs differently.
But I have yet to see a difference in comparing the lipos I have ran.
Let me know what you think
Tony
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