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Dual Batteries - 7/31/2010 10:26 PM   
dave de


 

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Status: offline 		I've read that many giant scale setups are using dual batteries. I would like to know how to set this up. Does the second battery cover both the servos & ignition. If someone has the knowledge & is willing to explain the set up, I,m sure it would help many. Thanks......... Currently I have 2 planes. The first plane I got has a battery for the ignition & another for the servos. My second Plane has one battery for everything. Both the planes are using A-123 batteries

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RE: Dual Batteries - 7/31/2010 10:45 PM   
BarracudaHockey



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Status: offline 		Dual battery setups usually refer to multiple reciever batteries. Nothing more than two batteries and two switches plugged into the reciever.

Gas planes would also carry an ignition battery or have a setup similar to what you have.

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RE: Dual Batteries - 9/11/2012 9:53 AM   
nubrnchld


 

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Status: offline 		I have a question, so just plug another switch and battery to an existing reciever on one of the empty ports correct? both of the batteries will be discharging at the same time right and by using two 6.6 vlt a123 does the volts going to the reciver remain at 6vlts or does this increase the voltage to the reciever any way?

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RE: Dual Batteries - 9/11/2012 12:32 PM   
Gtarling


 

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Status: offline 		nubrnchld - You can do as you say and it'll work just fine - you are effectively connecting the packs in parallel, so the voltage stays at 6.6V. Some would argue that you need to have some form of protection between each pack and the receiver - this guards against a shorted cell dragging everything down. It can be something as simple as a diode in each line, or one of the more sophisticated battery backer devices. There are others who would argue that such a device is not necessary and only serves to add extra complication and weight - the choice is yours!

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RE: Dual Batteries - 9/11/2012 1:47 PM   
BarracudaHockey



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Status: offline 		Each into a switch and into a reciever port. I would argue you don't need anything fancy.

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RE: Dual Batteries - 9/11/2012 2:05 PM   
nubrnchld


 

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Status: offline 		When mounting the batt. In the plane can u mount them on top each other or side by side? trying not to upset the bal. On the plane.

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RE: Dual Batteries - 9/11/2012 3:16 PM   
Goldenduff


 

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Status: offline 		As long as the plane balances at the recommended cog. Also laterally as well it's all good. Some space tbetwren batteries (if flight power batteries) to aid heat transfer is good too.

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RE: Dual Batteries - 9/11/2012 4:34 PM   
nubrnchld


 

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Status: offline 		Thanks everyone for all the great feed back, and remember keepum high the ground comes up pretty fast

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RE: Dual Batteries - 9/12/2012 5:31 AM   
Mikecam


 

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RE: Dual Batteries - 9/12/2012 7:59 PM   
Prairie Mike


 

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Status: offline 		Dave,
Just be sure to charge them separately. Check Red Scholefield's website for info about this. I use dual batteries on my Staggering and when cha4rging just do them one at a time.
http://www.hangtimes.com/redsbatteryclinic.html


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RE: Dual Batteries - 9/12/2012 8:50 PM   
nubrnchld


 

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Status: offline 		Thanks so muvh, I had read that in other threads but thanks for info though.

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RE: Dual Batteries - 9/12/2012 8:54 PM   
nubrnchld


 

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Status: offline 		Hey guys fo you have to use identical batteries

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RE: Dual Batteries - 9/24/2012 9:31 AM   
alan0899


 

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Status: offline 		G'day Mate,
As long as both batteries are the same voltage, ie, 4.8, 6, 6.6, whatever, the capacity does not matter, I often use 1700Mah 4.8, & a 1500Mah, 4.8 Nicad, together, no problems at all.
I am currently using 2 x 2000Mah, Eneloop packs, @ 6 volts & 2 x 2000Mah 4.8 volt packs, in 2 different planes of course.

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RE: Dual Batteries - 9/25/2012 1:23 PM   
a65l



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Status: offline 		I would make the argument that pack capacity is also important, and should be matched. You don't want to have, say, a 1500 mAh for one battery and a 3000 mAh for the other, the load would be unbalanced on the batteries. I don't personally know, all my dual battery setups use identical packs.

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