10000 mAh 7.4V 15C LiPo

[Kmot]

For all you power hungry mongrel dogs out there! :D

http://www.all-battery.com/74volt-10000mah15cli-polylipobatterypack31168.aspx

[mxz70017]

That seems awfully high over rated on amp draw...15C they say 150A!!Then at 20c 200A.Never seen anything that high before anywhere else.$107 dollars to go poof an puff pack would be not very good.

[Kmot]

15 x 100 amps = 150 amps. ;)

[theBOZman]

Still only 2 cells. :( Good AH but boo-hoo voltage. Gimme 2 packs in series and we'll talk, but price would bring the pain at that point.

[Kmot]

:confused:

[theBOZman]

:confused: = I don't buy low voltage packs.

[mxz70017]

Yah I hear the math.But thats with no load!!!You Go Look at Steve's site OFF Shore Electrics.An see If that 15c to 20c amp rateing to be safe Is even close!!!!Im seeing a 35c to 40c Is not even half that many amps continiuos load draw...

[Kmot]

Okay. :)

[mxz70017]

All LiPo cells packs should give you a stated C rating or continuous current rating. This is the maximum average recommended discharge current for the cell. For example, a 1000mAh pack with a 10c rating should not be discharged more than 10 amps continuous. To figure that out 1000mAh x 10c = 10,000mAh or 10 amps. We recommend that if your application will draw more than 60% of that rating, buy higher rated cells. Beware of "burst" ratings. Burst ratings are amp rating for only a few seconds. This is a poor way to judge the cells ability.

So with a 10,000 mha Pack you still only get 10 amp Discharge by my understanding.Most anything Ive run pulls 25A or better most cases better that battery wouldnt ha ndle It...

[mxz70017]

The top paragraph was copy an pasted straight out of Steves site.I have also read up alot more on lipos.That rateing they give Is to my mind dangerously over rated!!!!

[Kmot]

Okay. ;)

[nick_75au]

10,000 mAH * 10 = 100,000 milliamps or 100 amps


"15 x 100 amps = 150 amps."

150 amps is the load :rolleyes:

The only reading on a battery at no load that can be taken is open circuit voltage.
If you pull 20c (200 amps) out of this pack it is overloaded and will be toast in short order.
C rating is the pack capacity times the C rating value.
15 C is a fairly low value compared to a lot of packs marketed these days,

30C is common now which means if this particular pack happened to be rated at 30C 300 amps could be pulled out of it.

There are lipo packs out there that are rated at only 2C, capacity of 100,000 mAH (100AH) which means that only 200 amps can be pulled out of the pack safely

Those 30 40 C packs, what is the mAH value, probably less than half the mAH say 2300mAH, am I right?

Nick

[mxz70017]

Ill stick to Steve's Info..I just looked on that same site also Found 11.1v Packs for $154 bucks with a 10500Mah rateing. That they list high capacity.An there max discharge was far lower!!!!

[Kmot]

Okay. :)

I believe you guys. :)

Okay. ;)

[nick_75au]

Hi Chuck
Can you put a link to the site, Im having trouble getting to the lipos section
Thanks
Nick

[mxz70017]

This Is the lipo high cap I was refering too..
http://www.all-battery.com/111volt-11000mahheavydutyli-polypackwithpcb.aspx

Look at the max discharge amp rateing.

[Kmot]

lol...

[nick_75au]

sorry cant help myself

Chuck

Those are a whole different kettle of fish, 0.5 C rating ;) designed for consumer electronics not RC

Try these
http://www.all-battery.com/74volt-8000mah15cli-polylipobatterypack.aspx
120 amps max at 15C
http://www.all-battery.com/74volt-6600mah25cli-polylipobatterypack.aspx
smaller pack but higher 25C rating 165 amps

Nick

[theBOZman]

"15 x 100 amps = 150 amps."
Nick

uh, I think that would have to be 1.5 * 100 amps = 150 amps. Not 15 * 100 amps=150 amps.

15 * 100 amps = 1500 amps. :)

[Kmot]

I was just testin' ya'! ;):p

[nick_75au]

Good test, I missed it, serves me right for plagiarising :o

All good

Nick

[785boats]

Good test indeed.
Although the specs don't state it, the pack is actually a 2s2p setup. You can count 4 cells along the side.
It's made up from four 5000mah 15c cells with two pairs in series & then connected in parallel to give 7.4V. A common way to make high capacity packs using lower C rating cells. They are still good for a 150A current draw as calculated by in previous posts.
I've got some 3s 2p 11.1V (6 cell) packs like that.
Cheers.
Paul.
Oops! Just re-read the specs. It does say 2s2p.