150 C Lipo from Maxamps

[properchopper]

Some interesting points made. I agree with Jan that it's unusual that the "big name" battery suppliers haven't offered 150C packs - maybe they're more realistic in their units of measurement ?

Definitely agree that at the current demands a 150C pack can deliver, 12 Ga. wire would certainly get EXTREMELY hot.

I like the "waterproof" claim, but is this really "splashproof" for r/c cars ( which these packs are targeted for) or can they withstand boat immersion incidents ?

The 300 cycle guarantee sounds good, but at what standard ?

Once again, I'm not endorsing or promoting these, just interested in what everyone thinks. I will say that Maxamps has been great to deal with on my small parts orders.

[Flying Scotsman]

I work in electronics as a living and as far as current goes...have fun frying that 10ga wire check the awg guides and see what current 10awg is good for? maxamps are fools...maybe like g-freak and deans to boot make me howl it should be 8awg and be at least a 6.5 or larger bullet for constant amperage draws lol.So ya I will buy a car amplifier that makes 1000 amps then use lamp cord to wire it.

This post brought tears to my eyes, thank god there are still some people with a brain and not a marketing rubbish bin.

Edit, the car ampifier analogy had me in howls of laughter. I have a pretty good home STEREO system the amp delivers 120 watts RMS per channel on 120V AC not 12V DC and weighs over 60 lbs the internal wiring is massive and the amp is capable of driving very difficult loads ....2 ohms or less

Douggie

[tharmer]

I have a pair of 4s, 10000mah, 4000c (charge at .5 C) Ziggy batteries. Gonna try them in my 1/16th hydro.

Seriously though, I've ordered a pair for my Scorpion 4035. Bats deliver what is asked for so just because it says 150C doesn't mean we'll ever draw that much. My guess is that the high C rating is partly marketing. Nonetheless, it should keep the voltage from sagging under load spikes.
-t

[FighterCat57]

I have a pair of 4s, 10000mah, 4000c (charge at .5 C) Ziggy batteries. Gonna try them in my 1/16th hydro.

Seriously though, I've ordered a pair for my Scorpion 4035. Bats deliver what is asked for so just because it says 150C doesn't mean we'll ever draw that much. My guess is that the high C rating is partly marketing. Nonetheless, it should keep the voltage from sagging under load spikes.
-t

4000c? If this is an actual number and not a typo- I need to do some reading on lipo chemistry.

IIRC C rating has part to do with heat dissipation, so using a higher C rating will help reduce heat expansion AFAIK.

[properchopper]

I have a pair of 4s, 10000mah, 4000c (charge at .5 C) Ziggy batteries. Gonna try them in my 1/16th hydro.

Seriously though, I've ordered a pair for my Scorpion 4035. Bats deliver what is asked for so just because it says 150C doesn't mean we'll ever draw that much. My guess is that the high C rating is partly marketing. Nonetheless, it should keep the voltage from sagging under load spikes.
-t

I agree on the voltage sag concept; I assume that theoretically a higher C rating would resist sag better - remember that one volt down, let's say for arguments sake, results in a one KV drop in prop speed. Hmmm....

[Insaniac]

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 ?

Will it fit in the FE-30? LOL

[BakedMopar]

Well max amps claim waterproof and I don't see any false advertisement there. Every time I sunk a Turnigy lipo it's still working when it comes ashore and continue to work there after.

Now the C rating. Come on. Even the 40c batteries will not hold up to their claim!

[driftah]

well to attain the same result you could also see it as higher voltage needs less current for the same effect.....as lower voltages need way more current....hence why bmw and mercedes were thinking of going to 42 volt systems and that means less wiring in the cars and same results.home stereo amps have higher voltage but they sure dont draw 200 amps as your home wiring wouldnt handle that.. you would need power supplies etc,in the end you need power to make power period.and that lipo rating may be accurate if it got hit by lightning at the time of discharge lol bs marketing imo

[sjslhill]

To be honest, I have no idea on these packs. When it comes to batteries on boats these days, I am in the dark. I come here because I like R/C Fast Electric Boats.

I think you can build a real boat to ride in and chase the 100mph mark with LiPoly now days.


thanks for asking
Steve

[AlanN]

It makes no sense. Most racers are running spec stuff. 25C is all that is needed for that app. the car guys do not draw as much as boaters do. Even spec setups. So it seems like it's all a marketing typo or scam. The higher the C rating the higher the internal resistance. So even if they were a true item for sale they are not needed for most boaters.

[raptor347]

To be honest, I have no idea on these packs. When it comes to batteries on boats these days, I am in the dark. I come here because I like R/C Fast Electric Boats.

I think you can build a real boat to ride in and chase the 100mph mark with LiPoly now days.


thanks for asking
Steve

Mike Bontoft did it 2 years ago in a 12 foot laydown electric outboard hydro. One way over 100mph, 2 way average of 98 or so.

http://www.youtube.com/watch?v=-yNu2_LlO9s

I was lucky to be able to be there the first time it hit the water (got to drive the chase boat).

42 6S Enerland 5K lipo packs (2x 21 pack parallels).

[Darin Jordan]

Guys... you need to be careful in using packs like this, when trying to meet the NAMBA rules... These types of packs are generally already paralleled internally. My guess is that you'll find that this is actually several smaller C rated packs, paralleled together to get a 150C rating. Depending on how they are wired inside, running even ONE of these packs may be technically against the current NAMBA paralleling limits.

[BILL OXIDEAN]

LMAO...
150 C?!?!?!?!?!?!
Riiiiight... and my Turnigy packs deliver 40c every time LOL
Come one! why is it that Max amps has these cells and the "big names" like Thunder Power, PolyRc and Flight Power have not come up with something like it... sorry Tony and Max amps, but seeing is believing...
and 10ga wires with deans? Are they nuts!? Who does the ordering in the company?! Come one, at least have 8ga and 6.5mm plugs on them!
Sorry if I seem out of line, but this does not seem right.
If someone from Maxamps is reading this... I would like to see some hard evidence of these packs delivering... please

As a former driver I will have to agree with UB.
I've had plenty of these cells. its a 2s 2p pack and I'll be suprised if ROAR approves it.

They punch pretty hard at low current draw but boaters will make a puffer fish of them with a Neu motor and a 240

Good observation lol

[BILL OXIDEAN]

Guys... you need to be careful in using packs like this, when trying to meet the NAMBA rules... These types of packs are generally already paralleled internally. My guess is that you'll find that this is actually several smaller C rated packs, paralleled together to get a 150C rating. Depending on how they are wired inside, running even ONE of these packs may be technically against the current NAMBA paralleling limits.

Darin you are absolutely right.
I'll be suprised actually upset if ROAR legalizes these packs.

Yes I've done well with them but do NOT try to pull heavy load trust me.

You will not get a true 150c not 100c or even 80
That pack will blast equivallent to a 35c thunder power pack 40c tops.

they indeed are paralelled within the pack but I believe its only 2p

[BILL OXIDEAN]

Mike Bontoft did it 2 years ago in a 12 foot laydown electric outboard hydro. One way over 100mph, 2 way average of 98 or so.

http://www.youtube.com/watch?v=-yNu2_LlO9s

I was lucky to be able to be there the first time it hit the water (got to drive the chase boat).

42 6S Enerland 5K lipo packs (2x 21 pack parallels).

That's incred! Ironicly Maxamps asked me to build one.