How to switch to Lipo technology?

[DuckOfDeth]

oddly enough, I was just looking at that charger, $160. About the balancer though, would I need one that could balance 12 cells at once?

[saleens7]

well....yes.....but i would suggest you just get a singe 6s lipo with a high mah rating....that way you dont need to get such an expensive charger and balancer...

[DuckOfDeth]

but how will the voltage at 11.1 get me to the same voltage of 18 1.2 cells?

[saleens7]

11.1 volts? 6s is 22.2volts....6s2p is still 22.2volts with just twice the mah rating and C rating...3s is 11.1v

[DuckOfDeth]

BINGO!!
I see (said the blind man to his deaf son, who picked up his hammer and saw).

A simple 6s pack will get me where I need to be.

So now, with that knowledge firmly implanted, how do I figure out the MaH rating for my set-up? Do I simply match the MaH rating of my NiMH cells?

[NorthernBoater]

Do you know what the current you where drawing with the NiMh was?

[DuckOfDeth]

Or do I use the mystical 'c' value (that somehow equals the amp draw), and then match those values to the parameters of my ESC continuous and burst ratings? In which case, a lower MaH pack will work.

[DuckOfDeth]

NB,
I do not know, nor do I know how to calculate it? But that might be the next chapter in the DuckOfDeath's never ending quest for knowledge.

[saleens7]

well, you dont need to match it....mah doesent affect anything but run time....you could use 2000mah packs and 8000mah packs and the only difference youll see is the run time..

the mah stays the same if your using a pack in a series, but but doubles if you use a second pack in parallel...

[DuckOfDeth]

but it seems that the higher the MaH rating, the higher the continuous and busrt ratings? wouldn't these higher values exceed the limits of my ESC?

[saleens7]

Or do I use the mystical 'c' value (that somehow equals the amp draw), and then match those values to the parameters of my ESC continuous and burst ratings? In which case, a lower MaH pack will work.

umm you kind of confusing me....why do you need to matcht he paramiters of the esc with the mah of the cells

[saleens7]

but it seems that the higher the MaH rating, the higher the continuous and busrt ratings? wouldn't these higher values exceed the limits of my ESC?

the motor will only pull the amps its rated for from the packs...if the batt has a burst current of oh say 200amp and the motor has a max load of 50amps, it will only pull 50 amps from the battery if the motor hits is max load amps

[DuckOfDeth]

I can do that easily, you should see how well I confuse my wife.

Any way, As I look at cheapbatterypacks.com, they show me 6s packs, that have a MaH rating, and then they show the 'c' rating, below the 'c' rating is the continuous amp rating, and the burst rating. I must have thought that meant that it was the amp draw from the battery.

In order to stay under the 125 amps my ESC is rated to withstand, I would be able to actually pick a larger MaH pack than the NiMH's are rated, and subsequently attain a longer runtime, with all the other beneifts.

Is that a misguided assumption?

[DuckOfDeth]

How do I figure the amps that the motor will pull?

[saleens7]

i think you can buy a something that will tell you this....dont worry, how many amps the motor pull is how many amps will come from the batt