150 C Lipo from Maxamps

[tharmer]

Well, the first part of my post was tongue-in-Cheek. As for the rest, I have two coming, I have an Eagle Tree logger....we'll see.
-t

[BILL OXIDEAN]

Well, the first part of my post was tongue-in-Cheek. As for the rest, I have two coming, I have an Eagle Tree logger....we'll see.
-t

Please keep us updated

[drwayne]

Just got notice from Maxamps.

4S
6500 mah
150 C
5C charge capable
Hard case
100 % waterfproof
12 Ga wire [10 ga optional]
3 Yr / 300 cycle guarantee

$ 219.95.

Other sizes as well. unfortunate that no 5000 mah for 10K mah 4S2P rules.

Not sure what to think. Obviously for r/c car market, but...?

Mr. Hill ?

2S150C6500
* 3-year 300-cycle guarantee
* 45+mph in most brushless setups(7.4 volts)
* 39 minutes average run time(6500mah capacity)
* True 150C rating
* 5C fast charge capable
* 100% waterproof
* Built today with factory fresh cells
* Built with genuine 12awg Deans Ultra wire
* We add the connectors and balancing taps for you
* 138mm x 45mm x 24mm, 327g

39min avg = 167mA per minute !
Why would you need 150C when you Avg 0.025C ???

Have MaxAmps inadvertently employed a GFreak marketing guru ?

[Ub Hauled]

The reason I find higher C packs so appealing is not because I will use a constant higher amperage, but because the pack can keep a smooth charge on the caps on the ESC making the electronics work how they are supposed to... underfeeding the ESC is a big reason why they go puff.
Darin is on the money... MA is using the ole' smoke and mirrors on us... it's paralleled internally, rendering the pack illegal under NAMBA rules.

[NativePaul]

I cant belive I missed this thread, how come all the comedy passes me by?

Other sizes as well. unfortunate that no 5000 mah for 10K mah 4S2P rules.

yeah because 14,000 watts just isn't enough for a P hydro, you just gotta have that 22KW to get over the hump.

My guess is that you'll find that this is actually several smaller C rated packs, paralleled together to get a 150C rating

Darin, I'm surprised at you, paralleling cells increases capacity but does nothing at all to the C rating as it is a multiple of the capacity.
On the other hand I am sure you are correct in that the cells inside are lower than 150C, but the whole pack should be too, only way these are 150C is if the C stands for Cowcrap.

I have a question for the EEs out there, How many of these do I need to make the 1.21 jigawatts the flux capacitor in my Delorian needs?

[detox]

underfeeding the ESC is a big reason why they go puff.

Usually lipos puff and ESC's poof. I have seen lipos puff then poof.

Puff...Poof... there is a difference

[RaceMechaniX]

1.21 gigawatts! Sweet. Sorry had to get that out.

[properchopper]

Douggie, my amp goes to ELEVEN , (See "This is Spinal Tap; the Movie")

[sailr]

"C" ratings are NOT multiplied by paralleling! C rating is a constant! You multiply the mAh's but the C rating does not change!

[Darin Jordan]

"C" ratings are NOT multiplied by paralleling! C rating is a constant! You multiply the mAh's but the C rating does not change!

That's not entirely true...

C rating is "Additive" when put in parallel. Two 20C packs in parallel will provide 40C, etc.

If you pull apart one of these less expensive, big C rating packs, you'll find that is how they are doing it... they are paralleling a bunch of smaller cells together to "build up" the C-Rating....

[BILL OXIDEAN]

That's not entirely true...

C rating is "Additive" when put in parallel. Two 20C packs in parallel will provide 40C, etc.

If you pull apart one of these less expensive, big C rating packs, you'll find that is how they are doing it... they are paralleling a bunch of smaller cells together to "build up" the C-Rating....

I agree darin, I was told that nonsense by my uncle. You will DEFINITELY be able to ull more ams out of 2 4o c batts that 1 4o c batt

[sailr]

Of course you can because you just doubled the mAh! For instance, if you have a 2000mAh pack, rated at 30C, you can pull out 60A. If you parallel it with another pack, you now have 4000mAh which means you can pull out 120A. BUT! It is still 30C!

[sailr]

I really get tired of this stupid argument and the misinformation regarding C ratings so I contacted Pat at RC Lipos. He gave me permission to quote him. Hopefully this will end the misconception that 'stacking' packs changes the C rating!

This is the email I sent him:

I need an answer to a question that we are arguing about in our club. Does paralleling packs change the C rating? I say NO. It has nothing to do with the C rating of the packs, only increases the mAh. Others say by paralleling two 20C packs you get 40C. I say that is wrong.

Can you please clarify? Can I quote you?

Thanks so much!

Jim

Here is his reply:

Jim
Yes you can quote me. I am 30 years in the battery industry and is absolutely all I know.

You are 100% correct, the "C" rating remains the same. Where people get confused, you are able to pull twice the current on a 2P pack.

Lets use the Thunder Power TP6500 packs as an example.
This is made from 3250mAh cells at 45C
If it was not a parallel pack then you can discharge at 45C = 146.0A
Since it is a 2P your "C" rating is still the same but now you can do 292.0A

When you parallel cells the load is equally split among each parallel bank. This means in a 2P pack of the above that each side see's 146.0A load with is still 45C on the 3250mAh cells.

Hope this helps
Pat

[BakedMopar]

No the "C" rating doesn't change when paralleling BUT depending on how you look at it it the SAME THING!!!

1. 2000mah pack at 30c = 60 amps

2. 2- parallel 2000 30 c. = 4000 mah @ 30c = 120 amps

3. 2- parallel 2000 30c. = 2000mah @ 60c = 120 amps

You get the picture. It's more of a marketing thing I assume.

[Rumdog]

But, in a single pack, single P formation it is false advertising.