ramjesr

single would have less of a max discharge amp. rating

ozzy-crawl

iTrader: (14)

there is no amp rating difference between 2p or 1p if total capacity is the same.
personally i hate 2p packs,they seem to have a lot more problems that 1p packs.
thats pretty dodgy selling 2p packs as 1p

crusey_aus

iTrader: (3)

I actually wanted Paul from Venom to answer the question and explain the discrepancy

There would indeed be a difference between the pack construction methods unless the cells were identical in spec (resistance)

Assume the 2500mah cell has a resistance of 5 milliohms

Two of them in parallel would lower the resistance to 2.5 milliohms

Unless the single 5000mah cell had the same resistance they would offer a different discharge performance

Cheers

ramjesr

How do you figure? 2s is two batteries wire them in 2p your adding 2 more batteries in parallel,doubles your max discharge rate.

Dave H

Because they are smaller cells. 2 x 2500 = 1 x 5000 (times whatever C for both)

Dave H

Given the same construction, larger cells have lower resistance. Probably is some difference though, partially due to extra connections, aspect ratios of the cells, etc, but not 2:1.

Not sure, but I suspect the 1P might be slightly better largely because of fewer connections.

ramjesr

2 x 2500 in series = 2500mAh , 2 x 2500 in parallel = 5000mAh more discharge rate than 2500mAh

Dave H

That is a different situation, as you present it the both the capacity and voltage are different, mixing series and parallel with the same size cells. What you posted is technically true, but not very practical due to the voltage difference.

The original question was referring to the same capacity and voltage battery. Is there a difference between a 5000mAh 2S1P and a 5000mAh 2S2P? Note in both cases it is a 2S, I was only commenting on the difference in the parallel aspect (as were the other posters).

A 5000mAh 2S1P is constructed from two 5000 cells in series.
A 5000mAh 2S2P is constructed from four 2500 cells, two paralleled sets in series.

For this case the current capability is very close to equal.

crusey_aus

iTrader: (3)

Exactly Dave

I had heard stories from the past about manufacturers using inferior cells in a 2s2p construction to fudge the discharge ratings

Not sure if there was any truth in it

Still like to know why they are selling them as 2s1p packs when in fact they are not

Cheers

Dave H

Crusey, I agree the apparent 2S1P labeling is, well not sure what word to use. Especially since at least with some of their colored cases I have seen the case is semi-transparent, one could see the 4 cells fairly easily. (green case I think it was)

Cheers to you too bud.

crusey_aus

iTrader: (3)

Makes you wonder how much cheaper the 2500mah cells would actually be to manufacture, if that is indeed the case

Pretty nieve to think other manufacturers wouldnt be doing similar inside hardcase packs if there was money to be saved

Cheers

giantoffire

iTrader: (28)

I went to the track and try my last roar approved venom batt. it worked good, but when i tried to charge it, i couldnt. im getting piss off with this venom roar approved batteries, i have three and all of them are dead. this tuesday im getting back the first battery that i sent to venom. tomorrow im sending these two batteries back to venom. I have 2 venom lipo old soft pack (2s) for 1 year and more and they still work good.are these roar approved batt junk? Does anyone have a problem with them? I only run my jammin scrt10 at the track i dont bash with it. im thinking of buying gens batt. at least they are cheaper and i can buy more than one. thanks for you replies!!

bosco72

I love venoms products i have there street bike.But every time i buy a battery from that company they just don't perform like the other brands.I found out that the china knock offs work better.I hope venom does something about there batteries cause they make great cars and great company to deal with.

Duster_360

iTrader: (21)

Its the extra connections in the typical rough an tumble RC environment that would bother me. I don't see any excuse for them not being labeled correctly.

giantoffire

iTrader: (28)

which batt. do u recommend me?