Question for the li-po geniouses  
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All Forums >> Radios, Batteries, Clubhouse and more >> Batteries & Chargers >> Common Sense RC Support >> Question for the li-po geniouses
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Question for the li-po geniouses - 11/2/2006 4:03:23 PM   
zach8202


 

Posts: 19
Joined: 9/7/2006
From: , IN, USA
Status: offline 		Alright li-po geniouses, I have a question for you. I have now have two identical 10c 11.1v 1800mah li-po packs (same brand). My question is, what is the easiest and safest way to parallel wires these boys. Can you simply buy or build a y-harness or is there some better, safer way out there(I've seen some kind of board you hook them too and have heard about hooking both batteries into the rx). Also, if you did this would it drop the discharge rate, and if so are there any additional implications I need to consider with other electronics (such as the esc cutting off at an inncorrect voltage/time)Thanks!
       Post #: 1

RE: Question for the li-po geniouses - 11/5/2006 1:25:42 AM   
bnrusso



Posts: 42
Joined: 9/21/2005
From: Fox Lake, IL, USA
Status: offline 		Yes you can parallel them with a y harness but you should be sure that the 2 voltages are within .1V or.2V of each other measured with a digital multimeter. They should be both fully charged. They make a y harness for putting them in parallel or in series.
I am assuming that you are looking for a flight time equal to 3600MA 'cuz that's what it does.
http://www.finedesignrc.com/batteries/parallelyharness.jpg

I also have a loop harness to connect my 2 7.4V 4000ma packs is series to get 14.8V at 4000ma.
I bought them at the i-hobby show near Chicago.
http://www.finedesignrc.com/batteries/seriesyharness.jpg

_____________________________

Bruno
I'm retired. I've got more time than money,... I hope!

(in reply to zach8202)
       Post #: 2

RE: Question for the li-po geniouses - 11/5/2006 1:48:55 AM   
Time Pilot



Posts: 1468
Joined: 10/25/2003
From: Vancouver, BC, CANADA
Status: offline 		This may work too (not in stock yet):

http://www2.towerhobbies.com/cgi-bin/wti0001p?&W=000447734&I=GPMM3142&P=K

And for those who want to take two 2S packs to make a 4S pack:
http://www2.towerhobbies.com/cgi-bin/wti0001p?&W=000447734&I=GPMM3143&P=K

(in reply to bnrusso)
       Post #: 3

RE: Question for the li-po geniouses - 11/6/2006 12:40:51 PM   
zach8202


 

Posts: 19
Joined: 9/7/2006
From: , IN, USA
Status: offline 		When parallel wiring, do I need to consider any problems or cautions it may have on the ESC or any other electronics? I've heard something about when you parallel wire it messes with the esc so it cuts off at the wrong volatage and you end up discharging your packs too low and it ruins them. Any info on the accuracy of that would be great! Thanks!

< Message edited by zach8202 -- 11/6/2006 3:02:00 PM >

(in reply to Time Pilot)
       Post #: 4

RE: Question for the li-po geniouses - 11/6/2006 5:15:22 PM   
mikekomm



Posts: 166
Joined: 8/26/2002
From: Northridge, CA, USA
Status: offline 		No problem with parallel wiring. The situation you're describing is much more likely with serial wired packs.

Mike
www.CommonSenseRC.com

(in reply to zach8202)
       Post #: 5

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