Go Back  RCU Forums > RC Airplanes > Questions and Answers
Reload this Page >

eneloop batteries

Community
Search
Notices
Questions and Answers If you have general RC questions or answers discuss it here.

eneloop batteries

Thread Tools
 
Search this Thread
 
Old 06-01-2015, 03:50 PM
  #1  
tazzzz
Thread Starter
 
Join Date: Mar 2007
Location: wilmington, NC
Posts: 709
Likes: 0
Received 1 Like on 1 Post
Unhappy eneloop batteries

I just purchased 3 2000ma 9.6volt batteries from Hangtime. I have an accucycle elite charger. I not much on understanding batteries. with that said....they say to slow charge the new battery before using them. Im just not sure of the proper rates to charge them at. Can anyone tell me the rates I should them at on this particular charger? Should I charge them fully before I cycle them?...I guess Im more concerned with the slow charge aspect,,as they say not to charge to slowly.. What does it mean when they 1.5 to 2 c-rate. Enough questions-----------------ok.
Thx in advance==TAZZZZ
Old 06-01-2015, 03:54 PM
  #2  
scale only 4 me
My Feedback: (158)
 
scale only 4 me's Avatar
 
Join Date: Jan 2002
Location: Avon Lake, OH
Posts: 10,380
Received 51 Likes on 49 Posts
Default

50 mah, or use a wall wart charger that comes with radios

2c means two times capacity, for a 2000 that's 4 amps, . But I never charge nimh more than 1c

Last edited by scale only 4 me; 06-01-2015 at 03:58 PM.
Old 06-01-2015, 04:12 PM
  #3  
TFF
 
Join Date: Oct 2006
Location: Memphis, TN
Posts: 4,183
Likes: 0
Received 1 Like on 1 Post
Default

1/10C is safe but you could go 1/5C. the problem is wall-warts that 1/10C for 600mah cant break the threshold amps to charge for the big batterys.
Old 06-02-2015, 02:19 AM
  #4  
Steve Percifield
My Feedback: (14)
 
Steve Percifield's Avatar
 
Join Date: Feb 2002
Location: Noblesville, IN
Posts: 1,503
Likes: 0
Received 0 Likes on 0 Posts
Default

My 2000 mah Eneloops say charge at 200 mah for 14 hours. I will normally do this for 3 cycles and then charge them at 2c , as long as I'm using them. If I leave them set for several months, I go back to the 200 for 14 hours. I normally keep my batteries on trickle charge while in storage. I just found one I had forgot about in a plane. I charged it at 200 for 14 hours and got 2035 mah after discharge. It had set in the plane since last august.
Old 06-02-2015, 02:37 AM
  #5  
Rodney
Senior Member
 
Join Date: Dec 2001
Location: FL
Posts: 7,769
Likes: 0
Received 5 Likes on 5 Posts
Default

Yes, charging at 0.1C for 14 to 16 hours is always the safe way and the way that gives you the longest battery life. Also, at that rate, should you forget and leave it on charge for a long time, no damage will be done. I have used Eneloops for several years and find then to be ultra reliable and they do hold a charge for months of storage. I never fast charge them so can not say how well they hold up when doing that.
Old 06-02-2015, 02:54 AM
  #6  
scale only 4 me
My Feedback: (158)
 
scale only 4 me's Avatar
 
Join Date: Jan 2002
Location: Avon Lake, OH
Posts: 10,380
Received 51 Likes on 49 Posts
Default

Originally Posted by TFF
1/10C is safe but you could go 1/5C. the problem is wall-warts that 1/10C for 600mah cant break the threshold amps to charge for the big batterys.
Then I wonder how they've worked for me all these years.
Old 06-02-2015, 05:10 AM
  #7  
Champ-RCU
My Feedback: (132)
 
Join Date: Feb 2002
Location: Mt. Pleasant, PA
Posts: 206
Likes: 0
Received 0 Likes on 0 Posts
Default

What chargers are you using to charge a 2000 mAH battery at 1/10c? I was trying to get a charger off of Peak that is touted as their Sirius Charge Pro Former. Their web site and procedures to purchase are questionable in my mind. (Such as don't take CC or PayPal, send you an invoice with no return address with a note any questions to call them. If I needed to call them to order product why putz with all the other stuff. Are they scammers? I don't know, just don't trust what you need to go thru to get an order.)
Old 06-02-2015, 05:46 AM
  #8  
Rodney
Senior Member
 
Join Date: Dec 2001
Location: FL
Posts: 7,769
Likes: 0
Received 5 Likes on 5 Posts
Default

As long as your charger puts out more current than the self discharge rate of the battery (which is usually well less than 1 milliampere) and the open circuit voltage of the charger is greater than the voltage of the battery you are charging the battery will reach full charge if left on the charger long enough. It is a simple fact of physics.
Old 06-02-2015, 06:54 AM
  #9  
Champ-RCU
My Feedback: (132)
 
Join Date: Feb 2002
Location: Mt. Pleasant, PA
Posts: 206
Likes: 0
Received 0 Likes on 0 Posts
Default

Thanks Rodney, however what charger do you use. By the way in my previous post on Peak, I'm not saying that they are not ligit. It just feels to me like the scenario some went thru with organizations like RCM Plans. I would have no problem ordering from Peak if I heard from others who have done so successfully.

Mark

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



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.