Need Help Choosing lipo's
 

Hey guys, trying to put together a Christmas List. Im getting prepared for racing at Trax70in Browns Mills Nj. I have most of the things I need layed out- excepts for batteries. Currently I have 1 zippy 5s 4000mah pack, but my track's mains are 15 minutes long- I doubt 4000mah will make that long racing. I need help/suggestions on Lipo's. My track does not necessitate ROAR legal packs. Also for you racers out there, 4s or 5s?
My choices
-2x Enerland Hardcased 2s 5100mah$99 each
25C (127.5A) cont, 50C (255.0A) burst

-2x Reedy 2s 5000mah Pack$94 each
100A continuous, 125A-175A burst

-Elite 4s 5300mah Cell 30C
30C(159 amps) continuous, Burst C Rate 50C - (265 amps)

-ZIPPY-H 5000mAh 4S1P 20-30C Lipoly Pack $90 each
20c(100a) Continuous, Burst 30C(150a)

-NEU 5000EP 4S1P pack $195 each
30c(150a)Continuous, 60c(300a)






Please feel free to suggest other lipos to me, im trying not to venture past 210ish in price.

Thanks for the help in advanced
-Ben

For 2200kv, 4s. Try a pair of 5000 neu or fp lipos.

What is the size limitation on your RC? One or two packs?

not really any limitation. i can move my motor to opposite the steering servo if i have to.

or run 2x2s packs in my current battery tray. its a cen matrix truggy

I can't really make a suggestion based on experience, but have you considered the 5000mah 35C Elites? I've heard nothing but great things about them, and their price is awesome. They're sold out right now, but I'm told some more should be coming in within a week or so (I emailed Mike there as I'm looking to buy some myself). Only possible downside for your app is that they're an unusual shape, and obviously a tad lower capacity than the 5300's.

6Ah should run for 15 minutes. One of these mathematical geeks on here will work out the exact numbers, I'm sure. FP are probably the best, but the most $$$. Zippy are the cheapest, but are not race legal for the tracks that are checking. If they don't care about the packs, I would get a pair of the Zippy packs. Two of those are about the price of one of any of the other.

maybe 2x 4s zippy 3000mah?

here is the current setup mocked up, a single 5s pack, opposite the motor- the esc was behind the motor and the rx
http://i152.photobucket.com/albums/s...1127081912.jpg

And here is what i was thinking
http://i152.photobucket.com/albums/s...1127081909.jpg

To be safe, what about a pair of these?

http://www.hobbycity.com/hobbycity/s...5C_Lipoly_Pack

two in parrallel?

Thats over 1kg in weight... I was looking at 2 of these in parallel
http://www.hobbycity.com/hobbycity/s...C_Lipoly_Pack_


6200mah total, 144a Cont, and 216a burst
total of 120 dollars :D could get another 2 lipos on top if i wanted to :yes:

That would be perfect. The 3k Zippys are like 15c and may not hold to the MMM, but those will work just fine.

wow thats more amps then my current setup


4000mah 25-35c pack

That second picture could work if you found some creative spot to mount the steering servo.

I see you have the Reedy 2s pack in your list. On my informal testing of a used Reedy 5000 vs. a new Neu 2s 25c 5000 hard case ($60), the Neu showed +~.4 volt under 80-100 amp load better than the Reedy. Considering price, 2 of the Neu packs might be the ticket.

In the second picture the packs are saddle'd in the rear of the truck, motor across from the servo... could probably mount the esc on top on the steering servo.

Ok, I would go for that design.

Will your track allow a custom hardcase 4s lipo? For example. Bending a peice of thick lexan into the correct dimensions to cover the whole pack then shrinking it with specs on the shrink. For budget purposes that sounds like your best bet if your track will allow it.

Why? His track allows soft shell lipos.

my track doesnt even require hard cased lipos

I beat you.

Bleh.

Found out that the track runs 5 minute heats and 15 minute mains. So I should be able to use my zippy for the heats and whatever other battery for the main

Why not get some low-mah lightweight batts for the 5min races?

Depends on how much I have in my wallet..:whistle:

id try and run the same voltage in both the heats and mainsgoing from 5s to 4s allt eh time would screw with your driving and be a pita to change the cutoff everytime....

maybe mike could chime in i know he has alot more batts availbe to him than what he has listed he may can get you pair of 3300 or 3500 4s packs. his new lipos are top notch.

I just sent him an email:yes:

im sure he can find something good for ya in the 4s 6000 - 8000 range and alot of the packs he can get are short in length which is what you need to put them both behind the spur gear/ centerdiff, if you really want the hot setup you could have him make you a couple custom size tray matching trays to run on each side in the back, would be a very nice setup and ultra secure.

Maybe this will help some. http://www.rc-monster.com/forum/showthread.php?t=16216 Maybe not.

Ok, how about some cheap ebay batteries? Check these out, I'll get you a link in a sec.

I shot him an email to see what he says. 6200mah should get me through a 15min main without dumping, i want to know how they are getting 30 minute runtimes out of comparable packs. I still dont know what voltage to run... Length is not a problem, Matrix is a good 3/4'' longer then most truggies- even my zippy can fit behind the spur without a problem
It did help a lot but the difference between what people are saying makes me iffy. Since no one runs the same setup you know:oops:

I misread what youve asked but IMO it wouldnt be bad to take the extra step to protect your packs...

Well I would have 3/16th's kydex battery tray's so they will be safe:yes:

Here you go:
http://cgi.ebay.com/2x-3000mAh-11-1v...QQcmdZViewItem

The specs look good, price looks even better. but I dont know if I trust those ratings:lol:

I ordered a pair of 3s 2800 25c packs for the hyper st with 6s, I'll report back when they arrive. Ordered last saturday.

:lol: 5 minute runtimes?:rofl:

Ya I was going to say...

Two of these in parallel- http://cgi.ebay.com/New-14-8V-20C-35...1%7C240%3A1318

Two of these in series- http://cgi.ebay.com/RC-Car-truck-lip...1%7C240%3A1318

Two of these in series- http://cgi.ebay.com/RC-Car-lipo-batt...1%7C240%3A1318

Two of these in series- http://cgi.ebay.com/RC-7-4V-25C-4000...1%7C240%3A1318

Two of these in parallel- http://cgi.ebay.com/RC-Lab-4000mah-2...1%7C240%3A1318


Thiers a ton more than what I linked on ebay. Thats just to give you an idea.

No, lutach said i could expect ~10min.

:yes:

I'm hoping... I'll probably order a couple of those 6s 4000 packs TD linked to.