Go Back  R/C Tech Forums > General Forums > Electric On-Road
batteries not fully charging? >

batteries not fully charging?

Community
Wiki Posts
Search

batteries not fully charging?

Thread Tools
 
Search this Thread
 
Old 02-01-2005, 06:45 PM
  #1  
Tech Master
Thread Starter
iTrader: (26)
 
RCNitroDude999's Avatar
 
Join Date: Nov 2003
Location: Galveston Island
Posts: 1,661
Trader Rating: 26 (100%+)
Default batteries not fully charging?

well once again im having problems. I have two brand new zapped/matched 3300 nimh 6 cell packs, i use a superbrain 969 pro charging at 4.5 amps...the best the packs do is around 3100mah. What might i be doing wrong here?
RCNitroDude999 is offline  
Old 02-01-2005, 07:02 PM
  #2  
Tech Fanatic
 
crimson eagle's Avatar
 
Join Date: Jun 2003
Location: Nor Cal
Posts: 841
Default

Hi,

That's pretty bad, but I have some questions.

Are you fully discharging and equalizing the cells before charging?

What cut off method are you using and how are you setting it up?

When the batteries are charged do they feel warm?

Chris.
crimson eagle is offline  
Old 02-01-2005, 07:34 PM
  #3  
Tech Master
Thread Starter
iTrader: (26)
 
RCNitroDude999's Avatar
 
Join Date: Nov 2003
Location: Galveston Island
Posts: 1,661
Trader Rating: 26 (100%+)
Default

i put them on an equalizer tray and the lights did not come on at all, so i tried to discharge and nothing there either, i even tried the discharge cycle on the charger and it stopped immediantly. Yes the packs are warm, could it be this piece of shit charger i got?
RCNitroDude999 is offline  
Old 02-01-2005, 08:08 PM
  #4  
Tech Fanatic
 
crimson eagle's Avatar
 
Join Date: Jun 2003
Location: Nor Cal
Posts: 841
Default

Something sounds wrong. I'd suggest you get a friend to cycle your cells for you to see what he gets into them, pick someone with a good charger. This is just to make sure the cells are good. I'm assuming that as the cells get warm (not too warm though) that they are getting a full charge. It may be that your charger is badly calibrated and it's actually getting a full charge but it just doesn't look like it by the numbers on the cells. I have no idea how good the superbrain is but you should be getting around 4000 and even 4500 on a really good set. Be aware though that this is not what you will get out.
crimson eagle is offline  
Old 02-01-2005, 08:11 PM
  #5  
007
Tech Adept
 
007's Avatar
 
Join Date: Jan 2005
Location: Oshkosh, WI
Posts: 201
Default

That's interesting, is it possible to over charge NiMh?
007 is offline  
Old 02-01-2005, 08:16 PM
  #6  
Tech Apprentice
 
mcc-bri's Avatar
 
Join Date: Jul 2004
Location: winnipeg manitoba
Posts: 82
Default

3100 mili amps is just what the charger put into the cells, its not how much is in the cells
mcc-bri is offline  
Old 02-01-2005, 08:17 PM
  #7  
Tech Apprentice
 
mcc-bri's Avatar
 
Join Date: Jul 2004
Location: winnipeg manitoba
Posts: 82
Default

what did your cells peak out at when you first charged them up?
mcc-bri is offline  
Old 02-01-2005, 11:28 PM
  #8  
Tech Regular
 
StasI's Avatar
 
Join Date: Jan 2005
Location: Sydney , Austraila
Posts: 411
Default

check to see if your mah setting is 3300
StasI is offline  

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
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 On
Pingbacks are On
Refbacks are Off



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

Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.