Super Brain 989 battery recovery settings  
View related threads: (in this forum | in all forums)

Tower Hobbies
Enter up to 4 keywords or Tower stock numbers
Logged in as Guest



Users viewing this topic: none
  Printable Version
       

All Forums >> Radios, Batteries, Clubhouse and more >> Batteries & Chargers >> MRC Charger Product Support (i.e. Super Brain, etc) >> Super Brain 989 battery recovery settings
Page: [1]

Login
Message << Older Topic   Newer Topic >>
Super Brain 989 battery recovery settings - 4/15/2008 3:15:48 AM   
RTice


 

Posts: 154
Joined: 12/31/2007
From: Richmond, TX, USA
Status: offline 		I am borrowing a friend''s 989 to test and try to revive some Nimh batteries. I am not sure I am doing it correctly.

Batteries
7 each = 7.2v 900mah 2/3A (6 cell)
1 each = 7.2v 600mah (6 cell)
4 each = 4.8v 600mah (4 cell)

For the 6 cells, I have the discharge rate set at 4 amps. Every battery seems to discharge in approx 5 seconds or so. Is this right?

For charging, I have it set at 900, 6 cell, 1.2 amps. It charges and then the trickle charge (set at .25 amps) kicks in when the mah is around 150-200. It trickle charges and then ends, but the mah is only shows around 350-400mah. I''ve tried this with known good batteries and the 7.2v batteries never reach 900mah. What am I doing wrong? I''ve charged discharged several times.

I tried the 7.2v 600mah battery on a discharge/charge and it ended up showing something like 745mah. I''m confused.


What would be the proper settings and expected results for the 7.2 and 4.8v batteries?
Thanks
Rob
       Post #: 1

RE: Super Brain 989 battery recovery settings - 4/16/2008 4:22:35 PM   
RTice


 

Posts: 154
Joined: 12/31/2007
From: Richmond, TX, USA
Status: offline 		BumP

(in reply to RTice)
       Post #: 2

RE: Super Brain 989 battery recovery settings - 4/16/2008 6:23:02 PM   
Tim@MRC


 

Posts: 311
Joined: 7/24/2006
From: Edison, NJ, USA
Status: offline 		Ideally, you would like to use a charge/discharge rate of C/10, but who wants to wait that long. I would use nothing more than a 1C charge or discharge rate. So listed below are the setting I would use.

7.2v 900mah 2/3A (6 cell) 0.9 amps charge and discharge
7.2v 600mah (6 cell) 0.6 amps
4.8v 600mah (4 cell) 0.6 amps

The reciever pack you may want to take the time and cycle it at a lower rate, but the above settings should give you a good idea of what the batteries are capable of. Using a 4 amp discharge is putting too much of a load on the battery and it''s causing the voltage to drop, which is tripping off the charger.

Tim

(in reply to RTice)
       Post #: 3

RE: Super Brain 989 battery recovery settings - 4/16/2008 7:05:07 PM   
RTice


 

Posts: 154
Joined: 12/31/2007
From: Richmond, TX, USA
Status: offline 		Great. Thanks, Tim. Good news...I hope. I''ll try it tonight.

(in reply to Tim@MRC)
       Post #: 4

RE: Super Brain 989 battery recovery settings - 4/16/2008 7:09:14 PM   
Tim@MRC


 

Posts: 311
Joined: 7/24/2006
From: Edison, NJ, USA
Status: offline 		No problem...if you set the battery profile up, you can set up an "Auto-Cycle". I would do 3-5 cycles on each. This way you can go back and check the results of each cycle, if you don''t an improvement in capacity then the battery is probably shot.

(in reply to RTice)
       Post #: 5

RE: Super Brain 989 battery recovery settings - 4/16/2008 9:00:29 PM   
RTice


 

Posts: 154
Joined: 12/31/2007
From: Richmond, TX, USA
Status: offline 		Tim: One more thing. Any idea of why this occurred?
Thanks, Rob

I tried the 7.2v 600mah battery on a discharge/charge and it ended up showing something like 745mah. I''''m confused.

(in reply to Tim@MRC)
       Post #: 6

RE: Super Brain 989 battery recovery settings - 4/16/2008 9:40:48 PM   
Tim@MRC


 

Posts: 311
Joined: 7/24/2006
From: Edison, NJ, USA
Status: offline 		It's typical of good batteries to have a higher than rated capacity. It could also depend on what you have your peak threshold and discharge cutoff set at.

(in reply to RTice)
       Post #: 7

RE: Super Brain 989 battery recovery settings - 4/17/2008 2:42:42 AM   
RTice


 

Posts: 154
Joined: 12/31/2007
From: Richmond, TX, USA
Status: offline 		Hi Tim:
Strange things are happening. I changed the charge/discharge to .9 and ran 3 cycles. When it enters discharge mode, it appears that mah is rising. By the end of the discharge mode it is up around 400. Then when it goes into charge mode, it starts around 3 mah and starts climbing from there. I don't understand.
Rob

(in reply to Tim@MRC)
       Post #: 8

Page:   [1]
All Forums >> Radios, Batteries, Clubhouse and more >> Batteries & Chargers >> MRC Charger Product Support (i.e. Super Brain, etc) >> Super Brain 989 battery recovery settings
Page: [1]





Jump to:


Google 



Search | Marketplace | Event Calendar | Local Clubs | Magazine | Product Ratings | New Products | Discussion Forums

Photo Gallery | Member Video Posts | RCU Video Gallery | Instructor Search | Field|Track|Marina Search

Advertisers | Hobby Vendor Resources | Rate Manufacturers | Sign In/Sign Up

SITE MAP!   : :   FORUM RULES

© 2001 - 2007 24-7 RC, LLC, all rights reserved.

Charities we support that also need your help
Yorkie Rescue | Humane Society | ASPCA | Crohn's-Colitis America

Kaango.com Classifieds

0.438RCU1