Go Back  RCU Forums > RC Airplanes > Beginners
 rx Battery question. >

rx Battery question.

Community
Search
Notices
Beginners Beginners in RC start here for help.

rx Battery question.

Thread Tools
 
Search this Thread
 
Old 11-30-2007 | 12:34 PM
  #1  
venom290's Avatar
Thread Starter
 
Joined: Oct 2005
Posts: 369
Likes: 0
Received 0 Likes on 0 Posts
From: Jersey shore
Default rx Battery question.

What rating is this batt? 7 aaa bats,each says 1000 mah soldered together pos to neg. Each batt says 1,2V. When I check on my hobbico digital volt meter (MkII) it reasds 9.42 no load, 8.9 under load. I thought it was a 4.8 batt, but those readings don't look right. What am I missing???? And if I put 2 of those pack together with a y harness is thet parallel or in series? Could I do that, and with what results? thank you
venom
Old 11-30-2007 | 12:48 PM
  #2  
piper_chuck's Avatar
My Feedback: (12)
 
Joined: Jun 2004
Posts: 8,044
Likes: 0
Received 3 Likes on 3 Posts
From: Columbia, SC
Default RE: rx Battery question.

Seven cells wired in series will give a voltage of 8.2. However, a fully charged 1.2 volt battery will show somewhat higher voltage, so the 9.42 and 8.9 readings you are getting are reasonable. A 4.8 volt pack would only have 4 cells.

A Y harness would typically put them parallel, which would give you the same voltage output, but double the capacity, but if the polarity is reversed, some wires and batteries might get really hot. A better question is what are you trying to do?
Old 11-30-2007 | 12:54 PM
  #3  
venom290's Avatar
Thread Starter
 
Joined: Oct 2005
Posts: 369
Likes: 0
Received 0 Likes on 0 Posts
From: Jersey shore
Default RE: rx Battery question.

Welp, I have a few of those batts. laying around. I wanted to make a higher mA batt for long run time. ON rx and servos. Futaba 3 chan, ground freq. . I thought the packs were 4.8 volts though. So that would be to high voltage with just 1 of them then.
venom
Old 11-30-2007 | 12:56 PM
  #4  
venom290's Avatar
Thread Starter
 
Joined: Oct 2005
Posts: 369
Likes: 0
Received 0 Likes on 0 Posts
From: Jersey shore
Default RE: rx Battery question.

Would be for trucks/boats etc. So I could disassemble the packs, Solder 4 cells together, and have a 4.8 v, 1000mah pack? Do that again and put a y harness between the two and have a 2000mah, 4.8v pack? Sry for the questions, couldn't find any where and am going to work soon. Wanted to assemble on breaks.( I have long breaks, lol)
venom
Old 11-30-2007 | 01:33 PM
  #5  
Senior Member
 
Joined: Feb 2006
Posts: 4,465
Likes: 0
Received 2 Likes on 2 Posts
From: Arroyo Grande, CA
Default RE: rx Battery question.


ORIGINAL: piper_chuck


A Y harness would typically put them parallel, which would give you the same voltage output, but double the capacity, but if the polarity is reversed, some wires and batteries might get really hot. A better question is what are you trying to do?
A Y Harness?????

Vernom290, are these to be used with a BEC on your ESC?? Also what was the configuration of the stock battery??

Don
Old 11-30-2007 | 01:43 PM
  #6  
venom290's Avatar
Thread Starter
 
Joined: Oct 2005
Posts: 369
Likes: 0
Received 0 Likes on 0 Posts
From: Jersey shore
Default RE: rx Battery question.

ORIGINAL: Campgems

ORIGINAL: piper_chuck


A Y harness would typically put them parallel, which would give you the same voltage output, but double the capacity, but if the polarity is reversed, some wires and batteries might get really hot. A better question is what are you trying to do?
A Y Harness?????

Vernom290, are these to be used with a BEC on your ESC?? Also what was the configuration of the stock battery??


Don
nitro powered, just want to extend runtime for servos and rx
Old 11-30-2007 | 01:44 PM
  #7  
Senior Member
 
Joined: Feb 2006
Posts: 4,465
Likes: 0
Received 2 Likes on 2 Posts
From: Arroyo Grande, CA
Default RE: rx Battery question.

Piper chuck, never mind. After reading your post the third time it finally got through the thick skull what you were saying. IE parallel two 4.8 packs.

Don
Old 11-30-2007 | 02:04 PM
  #8  
Senior Member
 
Joined: Feb 2006
Posts: 4,465
Likes: 0
Received 2 Likes on 2 Posts
From: Arroyo Grande, CA
Default RE: rx Battery question.

OK, I'll go back to sleep now.

Don
Old 11-30-2007 | 03:08 PM
  #9  
BarracudaHockey's Avatar
My Feedback: (11)
 
Joined: Jul 2003
Posts: 28,282
Received 444 Likes on 363 Posts
From: Jacksonville, FL
Default RE: rx Battery question.

Series cells add the voltage.

Parallel cells add the capacity.

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are On



Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

Copyright © 2026 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.