RCCrawler Forums

JEDD · 07-19-2009, 02:54 PM

What batteries should i run and why? LiPo or NiCd? What are the pros and cons of the two? ill be powering two 55t fireball motors, through a rooster esc with two airtronic 94780 servos. my truck s a XTM X crawler. Also what size of battery should i run,? how many cells and mah?

JeremyH · 07-19-2009, 03:01 PM

Will your charger properly charge either battery?

JEDD · 07-19-2009, 03:09 PM

i will get the charget when i get the batteries

Flyin Hawaiian · 07-19-2009, 03:12 PM

A we don't use nicds anymore. Nimh is what we use. Personally i run 3 cell lipo 2200 mah in my Berg just for the power. Each cell in a lipo is 3.7 volts per cell. and a nimh is 1.2 volts. Lipos don't drop in power like nimh do they have power all the way till you hit the lipo cut off. the only down side is that they are unstable if no used correctly. Make sure you have an ESC with lipo cut off and is set up for the number of cell you are running. 3.0 volts per cell is the cut off.so in my case i run 3 cell and its set to 9 volts. If you do not use an esc without lipo cutoff you will over discharge the pack and the next time you charge it. It will overcharge and most likely explode and start a fire. But in your case i would use Nimh better cause the safe and cheap and very easy to work with. No special charger is needed with a Nimh. But with lipos you need a special lipo charger with a balancer to balance the cell in the lipo so you have equal volts in each cell while charging.

I say use Nimh for now until you understand lipo better. But if you use lipo know the risk.

JeremyH · 07-19-2009, 03:19 PM

I would start off with Lipo. The batteries are lighter, smaller and will liven up your crawler nicely! IIRC, that Rooster can only handle 2S lipo....you can probably get good runtimes with a 1500mAh 2S. I run dual 35Ts on my Clod and my 1800mAh 3S lipo will last about an hour.

oldhippie · 07-19-2009, 04:16 PM

Lipos are lighter and more powerful. for what ya got i would run 2cell lipo, anything over 20C and 1300mh,

JEDD · 07-19-2009, 06:03 PM

what does the 2s and 3s mean? i could run a 1800mah lipo and have an hour of run time too? arent the lipo batteries smaller?

JEDD · 07-19-2009, 06:07 PM

WILL my rooster esc work with lipo batteries?

oldhippie · 07-19-2009, 06:25 PM

what does the 2s and 3s mean?

2cell 7.4volt - 3cell 11.1 volt

i could run a 1800mah lipo and have an hour of run time too?

Yes

arent the lipo batteries smaller?

In size, not power/capacity

WILL my rooster esc work with lipo batteries?

2 cell only

JEDD · 07-19-2009, 06:45 PM

thanks alot OLDHIPPIE, what do you think i should use?

JEDD · 07-19-2009, 06:58 PM

what if i got with nimh battery, what mah should i get ???

ozpall · 07-19-2009, 09:10 PM

mah is what gives you the run time, so if you get a 5000mah you can run for a long time, but is gonna cost you more than a 1500mah, so its up to your budget as well.
somebody correct me if i'm wrong as i'm a newbie to electric, but that is my understanding.

kalin96 · 07-19-2009, 10:24 PM

think of it like this'
mah is like your fuel tank, more mah, more fuel, more runtime.
2s lipo or 6 cell nimh would be like your engine, 2s would be like a v6 and 3s would be like a v8.
more cells = more power

ozpall · 07-19-2009, 10:49 PM

exactly!!!

BJoe · 07-19-2009, 11:38 PM

Quote:

Originally Posted by ozpall

mah is what gives you the run time, so if you get a 5000mah you can run for a long time, but is gonna cost you more than a 1500mah, so its up to your budget as well.
somebody correct me if i'm wrong as i'm a newbie to electric, but that is my understanding.

Yup, you got it right Oscar

07-19-2009, 02:54 PM	#1
JEDD Newbie Join Date: Jul 2009 Location: Wagoner Posts: 9	LiPo or NiCd???? WHY What batteries should i run and why? LiPo or NiCd? What are the pros and cons of the two? ill be powering two 55t fireball motors, through a rooster esc with two airtronic 94780 servos. my truck s a XTM X crawler. Also what size of battery should i run,? how many cells and mah?

07-19-2009, 03:01 PM	#2
JeremyH I wanna be Dave Join Date: Sep 2005 Location: Houston, TX Posts: 16,952	Will your charger properly charge either battery?

07-19-2009, 03:09 PM	#3
JEDD Newbie Join Date: Jul 2009 Location: Wagoner Posts: 9	i will get the charget when i get the batteries

07-19-2009, 03:12 PM	#4
Flyin Hawaiian RCC Addict Join Date: Dec 2005 Location: Tucson Posts: 1,190	A we don't use nicds anymore. Nimh is what we use. Personally i run 3 cell lipo 2200 mah in my Berg just for the power. Each cell in a lipo is 3.7 volts per cell. and a nimh is 1.2 volts. Lipos don't drop in power like nimh do they have power all the way till you hit the lipo cut off. the only down side is that they are unstable if no used correctly. Make sure you have an ESC with lipo cut off and is set up for the number of cell you are running. 3.0 volts per cell is the cut off.so in my case i run 3 cell and its set to 9 volts. If you do not use an esc without lipo cutoff you will over discharge the pack and the next time you charge it. It will overcharge and most likely explode and start a fire. But in your case i would use Nimh better cause the safe and cheap and very easy to work with. No special charger is needed with a Nimh. But with lipos you need a special lipo charger with a balancer to balance the cell in the lipo so you have equal volts in each cell while charging. I say use Nimh for now until you understand lipo better. But if you use lipo know the risk.

07-19-2009, 03:19 PM	#5
JeremyH I wanna be Dave Join Date: Sep 2005 Location: Houston, TX Posts: 16,952	I would start off with Lipo. The batteries are lighter, smaller and will liven up your crawler nicely! IIRC, that Rooster can only handle 2S lipo....you can probably get good runtimes with a 1500mAh 2S. I run dual 35Ts on my Clod and my 1800mAh 3S lipo will last about an hour.

07-19-2009, 04:16 PM	#6
oldhippie I wanna be Dave Join Date: Feb 2009 Location: 20 miles southeeast of downtown Sacramento Posts: 2,373	Lipos are lighter and more powerful. for what ya got i would run 2cell lipo, anything over 20C and 1300mh,

07-19-2009, 06:03 PM	#7
JEDD Newbie Join Date: Jul 2009 Location: Wagoner Posts: 9	what does the 2s and 3s mean? i could run a 1800mah lipo and have an hour of run time too? arent the lipo batteries smaller?

07-19-2009, 06:07 PM	#8
JEDD Newbie Join Date: Jul 2009 Location: Wagoner Posts: 9	WILL my rooster esc work with lipo batteries?

07-19-2009, 06:25 PM	#9
oldhippie I wanna be Dave Join Date: Feb 2009 Location: 20 miles southeeast of downtown Sacramento Posts: 2,373	what does the 2s and 3s mean? 2cell 7.4volt - 3cell 11.1 volt i could run a 1800mah lipo and have an hour of run time too? Yes arent the lipo batteries smaller? In size, not power/capacity WILL my rooster esc work with lipo batteries? 2 cell only

07-19-2009, 06:45 PM	#10
JEDD Newbie Join Date: Jul 2009 Location: Wagoner Posts: 9	thanks alot OLDHIPPIE, what do you think i should use?

07-19-2009, 06:58 PM	#11
JEDD Newbie Join Date: Jul 2009 Location: Wagoner Posts: 9	what if i got with nimh battery, what mah should i get ???

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07-19-2009, 10:49 PM	#14
ozpall Quarry Creeper Join Date: Jul 2009 Location: St. Charles Posts: 227	exactly!!!

07-19-2009, 09:10 PM	#12
ozpall Quarry Creeper Join Date: Jul 2009 Location: St. Charles Posts: 227	mah is what gives you the run time, so if you get a 5000mah you can run for a long time, but is gonna cost you more than a 1500mah, so its up to your budget as well. somebody correct me if i'm wrong as i'm a newbie to electric, but that is my understanding.

07-19-2009, 10:24 PM	#13
kalin96 Quarry Creeper Join Date: Mar 2008 Location: Zachary Posts: 342	think of it like this' mah is like your fuel tank, more mah, more fuel, more runtime. 2s lipo or 6 cell nimh would be like your engine, 2s would be like a v6 and 3s would be like a v8. more cells = more power

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