Go Back  RCU Forums > Radios, Batteries, Clubhouse and more > Batteries & Chargers
Reload this Page >

NiMh batteries charged in NiCd mode (multiplex)

Notices
Batteries & Chargers Nicads, Nickel Metal Hydride, Lithium, LiPoly, Chargers, Cyclers, etc...

NiMh batteries charged in NiCd mode (multiplex)

Old 02-13-2006, 03:42 AM
  #1  
MNPS
Junior Member
Thread Starter
 
Join Date: Nov 2005
Location: Florida, FL
Posts: 7
Likes: 0
Received 0 Likes on 0 Posts
Default NiMh batteries charged in NiCd mode (multiplex)

Hello,
By mistake I charged a new TX pack I built with new NiMh Sanyo 2500 with a Multiplex 5014 in NiCd mode. Before I noticed, they were charged up to 1600mah. The charge was at 200mah. I stopped the charge and switched the mode to NiMh and am currently charging at 200 mah/discharging at 500 mah (cycle) 4 times.

What damage if any may have occured to these brand new batteries????

Thankyou,
Joe
Old 02-13-2006, 05:48 AM
  #2  
JNorton
My Feedback: (2)
 
JNorton's Avatar
 
Join Date: Jan 2002
Location: Coopersville, MI
Posts: 4,333
Likes: 0
Received 1 Like on 1 Post
Default RE: NiMh batteries charged in NiCd mode (multiplex)

If the batteries were not hot you should be fine.
John
Old 02-13-2006, 07:58 AM
  #3  
gerwen
 
gerwen's Avatar
 
Join Date: Nov 2004
Location: St. Thomas, ON, CANADA
Posts: 2,088
Likes: 0
Received 0 Likes on 0 Posts
Default RE: NiMh batteries charged in NiCd mode (multiplex)

I don't think you could've harmed them at that charge rate. The difference between Nimh and Nicad charge types is peak sensitivity. When form charging a new pack, you WANT to go past the peak with C/10 rate to equalize the cells. Some folks trick their chargers into form charging a Nimh by setting it to Nicad so it won't peak.

Form charge is a slow (C/10) charge for ~16 hours. If your charger can't do 250mA then 200mA for ~19 hours should do the same thing.
Old 02-13-2006, 08:35 AM
  #4  
Rodney
Senior Member
 
Join Date: Dec 2001
Location: FL
Posts: 7,769
Likes: 0
Received 5 Likes on 5 Posts
Default RE: NiMh batteries charged in NiCd mode (multiplex)

You were well under the 0.1C rate so no harm done, even if you had left them on for 24 hours.
Old 02-13-2006, 01:35 PM
  #5  
MNPS
Junior Member
Thread Starter
 
Join Date: Nov 2005
Location: Florida, FL
Posts: 7
Likes: 0
Received 0 Likes on 0 Posts
Default RE: NiMh batteries charged in NiCd mode (multiplex)

Thank you all for your answers.
Joe
Old 02-13-2006, 02:08 PM
  #6  
SitNFly
Senior Member
My Feedback: (54)
 
Join Date: Feb 2002
Location: Four Corners
Posts: 701
Likes: 0
Received 1 Like on 1 Post
Default RE: NiMh batteries charged in NiCd mode (multiplex)

ORIGINAL: gerwen

The difference between Nimh and Nicad charge types is peak sensitivity. When form charging a new pack, you WANT to go past the peak with C/10 rate to equalize the cells. Some folks trick their chargers into form charging a Nimh by setting it to Nicad so it won't peak.
Good point here. My Hitec CG335 (NiCd only charger) will charge NiMh batteries also. It's sensitive enough to catch the less pronounced peak of NiMh. I watched it the first couple times just to be sure it didn't boil my batteries, though...
Old 02-13-2006, 03:58 PM
  #7  
JNorton
My Feedback: (2)
 
JNorton's Avatar
 
Join Date: Jan 2002
Location: Coopersville, MI
Posts: 4,333
Likes: 0
Received 1 Like on 1 Post
Default RE: NiMh batteries charged in NiCd mode (multiplex)

SitNFly,
Watch it when the NiMh packs get old - the knee is less pronounced and may lead to an overcharge.
John
Old 02-16-2006, 11:25 AM
  #8  
Geistware
Senior Member
My Feedback: (16)
 
Join Date: Apr 2002
Location: Locust Grove, GA
Posts: 12,942
Likes: 0
Received 0 Likes on 0 Posts
Default RE: NiMh batteries charged in NiCd mode (multiplex)

Do to the low charge rate, no damage was done.
If any damage was done it was from stoping the charging process before it was completed. The need for a NiMH specific charger is only for peak charging not overnight charging.
Old 02-16-2006, 11:39 AM
  #9  
JNorton
My Feedback: (2)
 
JNorton's Avatar
 
Join Date: Jan 2002
Location: Coopersville, MI
Posts: 4,333
Likes: 0
Received 1 Like on 1 Post
Default RE: NiMh batteries charged in NiCd mode (multiplex)

Geistware,
I was answering SitNfly. His Hitec CG335 is a 12v operated delta peak charger capable of charging 4-24 cells from 270-3000mah. If I have replied to your post and it was for someone else I appologize.
John

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


Thread Tools
Search this Thread

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.