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adamargue · 10-07-2010, 12:06 AM

Hey guys I have a very limited knowledge on batteries and electronics in general. I was wondering about wiring batteries in parallel:

I have 2 1900 nimh 6 cell stick packs and was wondering if I wire them together will it go up to 3800?

Right now I could get like 10min out of one of thoes batteries is there a estimate on the run time after wired together.

Thanks for the help.
Adam

JeremyH · 10-07-2010, 07:02 AM

Yes, when you wire batteries in parallel, the voltage will stay the same and the capacities are added together.

Now, the real question is why you are getting such crappy performance from your batteries? I run one of my scalers on a 2700mAh pack and get about 2 hours of runtime. It sounds like your packs are not getting fully charged. Which can either be a problem with the charger or the battery.

killswitch · 10-07-2010, 07:24 AM

My guess would be the pack probably isnt getting properly peaked.

JeremyH · 10-07-2010, 07:26 AM

That is what I was thinking as well....

killswitch · 10-07-2010, 07:32 AM

more info on the truck and electronics would be helpful too... and how old are the cells?

adamargue · 10-07-2010, 08:17 AM

These babttries are kinda old I think they are piranha's I just got them from my brother In law as he was cleaning out. His garage. My truck is running a side winder with a brushed motor eaither 45 or 55 can't remember. Just a crappy servo from my t-maxx.

My charger is a vision peek 2 charger it says they get charged up all the way. I usually charger them on 2 amp

killswitch · 10-07-2010, 08:37 AM

Quote:

Originally Posted by adamargue

These babttries are kinda old I think they are piranha's
My charger is a vision peek 2 charger it says they get charged up all the way. I usually charger them on 2 amp

if they are old and piranhas thats probably your problem. They werent good cells to begin with.

adamargue · 10-07-2010, 08:39 AM

Yah they are kinda beat up. Thanks a lot for ur help guys.

ThunderVP · 10-07-2010, 08:57 AM

How long are the bats on the charger before they peek?
At 2 amp charge rate 1900mah packs should take about an hour to charge. If they are peeking in like 15 minutes, they are false peeking (not fully charged) hence your short run times.
With your setup and 1900s you should see at least an hour run time per pack.

adamargue · 10-07-2010, 09:01 AM

It takes about 25 to 30 minutes. The battery I am running in my truck now only lasts a half hour and it's a 3000

adamargue · 10-07-2010, 09:09 AM

I have anouther question too. I just got a turnigy 420 lipo charger. And I was wondering does any one know if it balances the lipos also. It charges through the balance plug but I don't know if I balances them also

JohnRobHolmes · 10-07-2010, 09:41 AM

Yes, it will balance them.

Don't ever charge nimh or nicad in parallel, as the "peaked" cells have a lower resistance and they will overcharge as compared to the other cells in parallel. You can discharge them in parallel.

adamargue · 10-07-2010, 09:54 AM

So if I wire these batteries in parallel how do u charge them

JohnRobHolmes · 10-07-2010, 09:55 AM

You take them apart and charge them as two packs.

adamargue · 10-07-2010, 09:58 AM

Ok. So to wire them in parelell would u have a deans plug on both battery then make some sort of y harness to plug them both into ur esc

JohnRobHolmes · 10-07-2010, 10:02 AM

yep

adamargue · 10-07-2010, 10:09 AM

Cool thanks a lot

10-07-2010, 12:06 AM	#1
adamargue RCC Addict Join Date: Nov 2009 Location: Tulsa Posts: 1,667	Batteries in parallel Hey guys I have a very limited knowledge on batteries and electronics in general. I was wondering about wiring batteries in parallel: I have 2 1900 nimh 6 cell stick packs and was wondering if I wire them together will it go up to 3800? Right now I could get like 10min out of one of thoes batteries is there a estimate on the run time after wired together. Thanks for the help. Adam

10-07-2010, 09:01 AM	#10
adamargue RCC Addict Join Date: Nov 2009 Location: Tulsa Posts: 1,667	It takes about 25 to 30 minutes. The battery I am running in my truck now only lasts a half hour and it's a 3000 Last edited by adamargue; 10-07-2010 at 09:05 AM.

10-07-2010, 07:02 AM	#2
JeremyH I wanna be Dave Join Date: Sep 2005 Location: Houston, TX Posts: 16,952	Yes, when you wire batteries in parallel, the voltage will stay the same and the capacities are added together. Now, the real question is why you are getting such crappy performance from your batteries? I run one of my scalers on a 2700mAh pack and get about 2 hours of runtime. It sounds like your packs are not getting fully charged. Which can either be a problem with the charger or the battery.

10-07-2010, 07:24 AM	#3
killswitch RCC Addict Join Date: Jun 2005 Location: St. Albans Posts: 1,441	My guess would be the pack probably isnt getting properly peaked.

10-07-2010, 07:26 AM	#4
JeremyH I wanna be Dave Join Date: Sep 2005 Location: Houston, TX Posts: 16,952	That is what I was thinking as well....

10-07-2010, 07:32 AM	#5
killswitch RCC Addict Join Date: Jun 2005 Location: St. Albans Posts: 1,441	more info on the truck and electronics would be helpful too... and how old are the cells?

10-07-2010, 08:17 AM	#6
adamargue RCC Addict Join Date: Nov 2009 Location: Tulsa Posts: 1,667	These babttries are kinda old I think they are piranha's I just got them from my brother In law as he was cleaning out. His garage. My truck is running a side winder with a brushed motor eaither 45 or 55 can't remember. Just a crappy servo from my t-maxx. My charger is a vision peek 2 charger it says they get charged up all the way. I usually charger them on 2 amp

10-07-2010, 08:39 AM	#8
adamargue RCC Addict Join Date: Nov 2009 Location: Tulsa Posts: 1,667	Yah they are kinda beat up. Thanks a lot for ur help guys.

10-07-2010, 08:57 AM	#9
ThunderVP Quarry Creeper Join Date: May 2004 Location: SW of Chicago Posts: 212	How long are the bats on the charger before they peek? At 2 amp charge rate 1900mah packs should take about an hour to charge. If they are peeking in like 15 minutes, they are false peeking (not fully charged) hence your short run times. With your setup and 1900s you should see at least an hour run time per pack.

10-07-2010, 09:09 AM	#11
adamargue RCC Addict Join Date: Nov 2009 Location: Tulsa Posts: 1,667	I have anouther question too. I just got a turnigy 420 lipo charger. And I was wondering does any one know if it balances the lipos also. It charges through the balance plug but I don't know if I balances them also

10-07-2010, 09:41 AM	#12
JohnRobHolmes owner, Holmes Hobbies LLC Join Date: Nov 2004 Location: Volt up! Gear down! Posts: 20,290	Yes, it will balance them. Don't ever charge nimh or nicad in parallel, as the "peaked" cells have a lower resistance and they will overcharge as compared to the other cells in parallel. You can discharge them in parallel.

10-07-2010, 09:54 AM	#13
adamargue RCC Addict Join Date: Nov 2009 Location: Tulsa Posts: 1,667	So if I wire these batteries in parallel how do u charge them

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10-07-2010, 09:55 AM	#14
JohnRobHolmes owner, Holmes Hobbies LLC Join Date: Nov 2004 Location: Volt up! Gear down! Posts: 20,290	You take them apart and charge them as two packs.

10-07-2010, 09:58 AM	#15
adamargue RCC Addict Join Date: Nov 2009 Location: Tulsa Posts: 1,667	Ok. So to wire them in parelell would u have a deans plug on both battery then make some sort of y harness to plug them both into ur esc

10-07-2010, 10:02 AM	#16
JohnRobHolmes owner, Holmes Hobbies LLC Join Date: Nov 2004 Location: Volt up! Gear down! Posts: 20,290	yep

10-07-2010, 10:09 AM	#17
adamargue RCC Addict Join Date: Nov 2009 Location: Tulsa Posts: 1,667	Cool thanks a lot

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