RE: Discharging to .9v/cell  
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
       


FISHER FUEL PRODUCTS 5 GALLON & 2.5 GAS FUELERS
Seller:  hunternfla
Details:   $220.00   |  10/2/2008   |  Classified Ad
We will rotate YOUR AD in this spot if you select "Forum Featured" when placing or editing your ad!

All Forums >> Radios, Batteries, Clubhouse and more >> Batteries & Chargers >> RE: Discharging to .9v/cell
Page: <<   < prev  1 2 [3]

Login
Message << Older Topic   Newer Topic >>
RE: Discharging to .9v/cell - 11/22/2004 4:12:32 AM   
JohnMuchow


 

Posts: 64
Joined: 10/6/2003
From: New York, NY, USA
Status: offline 		Thanks for posting that Red...I completely forgot about the rising internal res.


_____________________________

John Muchow
CamLight Systems

(in reply to Red Scholefield)
       Post #: 51

RE: Discharging to .9v/cell - 11/23/2004 6:25:18 AM   
Mike01


 

Posts: 643
Joined: 12/29/2003
From: Brooklyn, NY, USA
Status: offline 		Here is something I wish someone would explain. Lately I've started doing things to NiMH packs people say shouldn't be done. Dead shorting, discharging to .1V/cell and storing, etc.

I've also started discharging my pro-match packs, the home soldered ones, at 30A. I have one pack that routinely gave me 2700 - 2800mAh at a 3A discharge. I thought this pack really sucked.

So when I discharged the pack at 30A, I expected something like 2300mAh, maybe 2400. Instead, with a 5.4V cutoff (with 4 cells dumping), I got 2788mAh! At 30 freackin Amps! Then, I finished it off with a 1A discharge at got a total of 3099. This is from a pack that has never seen 3Ah.

Now, I've heard of cells being "trained" a certain way...but this is ridiculous. Yes, those cells are cycled and matched at 30A, but everyone always says it ruins cells to discharge at 30A. Could the opposite be true?

Can someone please tell me why I'm getting better numbers with a 30A discharge than with a 3A discharge? Does that make any kind of sense?

(in reply to JohnMuchow)
       Post #: 52

RE: Discharging to .9v/cell - 11/23/2004 12:53:56 PM   
exeter_acres



Posts: 6074
Joined: 9/22/2004
From: Johns Creek, GA, USA
Status: offline 		30 amps??

or

.30 amps??

(in reply to Mike01)
       Post #: 53

RE: Discharging to .9v/cell - 11/23/2004 3:26:33 PM   
Rodney



Posts: 4779
Joined: 12/8/2001
From: FL
Status: offline 		Have you checked the accuracy of your measuring gear?

(in reply to exeter_acres)
       Post #: 54

RE: Discharging to .9v/cell - 11/23/2004 4:55:26 PM   
Mike01


 

Posts: 643
Joined: 12/29/2003
From: Brooklyn, NY, USA
Status: offline 		30As, as in 30,000mAhs.

My measuring gear is a Futaba CDR-5000, an over 400 dollar precision battery charger/discharger that monitors the individual voltage of each cell in a side by side pack (via a 7 wire harness), tracks battery temperature, outside temperature, humidity, internal resistance, average voltages, plots charge and discharge graphs for each cell, has a giant display screen full of super accurate numbers and has been telling me the cold hard truth about my battery packs for months now.

These results, for me, are nothing short of astonishing.

(in reply to Rodney)
       Post #: 55

Page:   <<   < prev  1 2 [3]
All Forums >> Radios, Batteries, Clubhouse and more >> Batteries & Chargers >> RE: Discharging to .9v/cell
Page: <<   < prev  1 2 [3]





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

0.453RCU1