What's My Optimum Charge for these Batteries?  
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 >> What's My Optimum Charge for these Batteries?
Page: [1]

Login
Message << Older Topic   Newer Topic >>
What's My Optimum Charge for these Batteries? - 6/28/2002 4:47:15 AM   
Greyhawk



Posts: 140
Joined: 6/4/2002
From: Sammamish, WA, USA
Status: offline 		12 1.2v Nicads @ 1800 mAh.

When they're fully charged what should the voltage read? When they are drained what should it read.

Like your field battery 13v = fully charged, 12v = time to recharge. does that logic apply here?

Thanks.
       Post #: 1

What's My Optimum Charge for these Batteries? - 6/28/2002 5:03:48 AM   
Red Scholefield



Posts: 4905
Joined: 12/8/2001
From: Newberry, FL, USA
Status: offline 		Full charge, open circuit voltage reading 16.2 or greater. Open circuit voltage fully discharged, 14.4 or less. You would get a better reading if there was a slight load applied. Then anything under 13.2 would indicate full discharge.

_____________________________

Red S.
AMA 951 Leader Member

(in reply to Greyhawk)
       Post #: 2

Ooops! - 6/30/2002 4:53:54 AM   
thomasb



Posts: 343
Joined: 6/6/2002
From: Private, CA, USA
Status: offline 		[QUOTE]12 1.2v Nicads @ 1800 mAh. When they're fully charged what should the voltage read? [/QUOTE]It is not practical to tell if a NiCd is "fully charged" by reading its voltage. You can determine if it was recently on a charger though. NiCD's are not like Lead Acid's -- using the voltage method for determining full charge is a bit inaccurate.

[QUOTE]When they are drained what should it read. [/QUOTE]As they are used under nominal loads (C/5), the voltage will spend the majoity of its time slightly above 1.2V per cell. When they hit 1.185 volts per cell, I stop flying. The battery makers use about 1.0V / cell (at 20 degrees C) as the cut-off, but that would be an insane no-fly level to use at the field.

Red offered some good advice, but I do deviate a bit from what he said.

< Message edited by thomasb -- Jun 30 2002 1:30AM >

(in reply to Greyhawk)
       Post #: 3

Page:   [1]
All Forums >> Radios, Batteries, Clubhouse and more >> Batteries & Chargers >> What's My Optimum Charge for these Batteries?
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

0.234RCU1