Go Back  RCU Forums > RC Airplanes > Beginners
 battery doesnt charge >

battery doesnt charge

Notices
Beginners Beginners in RC start here for help.

battery doesnt charge

Old 03-05-2008, 09:20 PM
  #1  
Senior Member
Thread Starter
 
Alex7403's Avatar
 
Join Date: Jun 2004
Location: New york, NY
Posts: 1,594
Likes: 0
Received 1 Like on 1 Post
Default battery doesnt charge

hello,

im trying to charge a 12v 4.5Amp battery inside my field box.
and after 24 hours of charging:

the charging alligators are connected to the starter jack i'm pressing test - all lights are on

removing the alligators only first red light is on.

i tested the charger it shows more then 12v

testing the starter jack it shows less then 6v

i charged this battery in the past (at least i think i did ) used this battery less the 4 days of flying...

does this means my battery is dead???

Thanks
Alex
Attached Thumbnails Click image for larger version

Name:	Tq48731.jpg
Views:	18
Size:	82.5 KB
ID:	895857   Click image for larger version

Name:	Jh16174.jpg
Views:	11
Size:	79.0 KB
ID:	895858   Click image for larger version

Name:	Qn38517.jpg
Views:	14
Size:	27.0 KB
ID:	895859  
Old 03-05-2008, 09:48 PM
  #2  
Senior Member
 
wings's Avatar
 
Join Date: Aug 2003
Location: Carrollton, KY
Posts: 1,589
Likes: 0
Received 0 Likes on 0 Posts
Default RE: battery doesnt charge

I usually charge mine the night before every time I fly.

Depending how much you used your starter,etc, 4 days of flying is quite a bit.



Are you saying it won't hold a charge?

I would open up your field box and hooked the alligator clips directly to the battery and try that. You may have a loose connection somewhere between the batter and charging jack.


Old 03-05-2008, 09:54 PM
  #3  
Senior Member
 
Join Date: Nov 2007
Location: , MD
Posts: 102
Likes: 0
Received 0 Likes on 0 Posts
Default RE: battery doesnt charge

What charger are you using? What are the specs on the charger?
Old 03-05-2008, 10:20 PM
  #4  
 
Join Date: Nov 2004
Location: Memphis, TN
Posts: 11,703
Likes: 0
Received 1 Like on 1 Post
Default RE: battery doesnt charge

Measure across the battery while charging and you should see 12+ volts.
Old 03-05-2008, 11:10 PM
  #5  
Senior Member
Thread Starter
 
Alex7403's Avatar
 
Join Date: Jun 2004
Location: New york, NY
Posts: 1,594
Likes: 0
Received 1 Like on 1 Post
Default RE: battery doesnt charge

while charging across the battery its showing 12.5 v, i'll see it tomorrow if it charged or not.

the charger which tower recommended
The Tower Hobbies 12V Charger plugs into a 110V AC wall outlet and charges
12V Lead-Acid Sealed or Gel-Cell Batteries Overnight.

INCLUDES: One 12V Charger w/attached 6' Cord and Alligator Clips.

SPECS: This charger TRICKLE charges your battery at a 500mAh rate.
Input Voltage: 110V AC US Standard
NOTE: Power panel batteries can be charged by plugging charger into
the starter jacks on the power panel.

Thanks
Old 03-05-2008, 11:31 PM
  #6  
Senior Member
 
Join Date: Nov 2007
Location: , MD
Posts: 102
Likes: 0
Received 0 Likes on 0 Posts
Default RE: battery doesnt charge

it should have been charged in 24hrs assuming the battery isn't dead.
Old 03-06-2008, 12:31 PM
  #7  
 
opjose's Avatar
 
Join Date: Nov 2005
Location: Poolesville, MD
Posts: 12,624
Likes: 0
Received 0 Likes on 0 Posts
Default RE: battery doesnt charge

Actually that battery only needs a 10-11hr charge time, assuming 500mA charge rate, going by the on-line charge time calculators.

If you've been charging it for longer intervals you may have prematurely ruined the battery.

Also how quickly do you normally discharge it?

I have a small Hobbico electric starter pack on one of my e-starters, and I find that the battery only lasts a season, because of very heavy use.

Old 03-06-2008, 02:43 PM
  #8  
Senior Member
 
Join Date: Dec 2001
Location: FL
Posts: 7,769
Likes: 0
Received 5 Likes on 5 Posts
Default RE: battery doesnt charge

I assume this is a PB based battery, i.e. gell cell or such. If so, they can easily be ruined by discharging to deeply, always recharge as soon as the voltage falls below 12 volts. They are also easily ruined by to fast a charge, best to limit to a charge rate of 0.1C and then only use a current limited constant voltage charger. By doing that you won't over charge even if you forget and leave the charger on to long. Check out www.rcbatteryclinic.com for some good advice on the care of your batteries, all types.
Old 03-06-2008, 02:45 PM
  #9  
My Feedback: (1)
 
CGRetired's Avatar
 
Join Date: Sep 2004
Location: Galloway, NJ
Posts: 8,999
Likes: 0
Received 1 Like on 1 Post
Default RE: battery doesnt charge

Yeah, the battery he shows in the picture is a sealed Lead Acid battery.

I have one of those Sears emergency car jumper battery packs very similar to the one shown in the picture. It comes complete with a charger (115vac) and two output jacks.. and I added a third one. One of the output's is a fused 'cigarette lighter' type of jack. The other two are wired directly to the battery terminals and are not fused.

The charger uses a plug in similar to a wall plug.. I simply plug the short extension into the side of the plastic package and a red light comes on. When it's done, the red light turns green and i'm ready to go. It usually sits on there overnight the day before I go flying and it's good to go. It becomes a routine.. RX battery on charger, TX battery on charge, Glow Driver on charge, and the starter battery (the one that is the main subject of this reply) gets plugged in. All are ready the next morning... well, hopefully that is...

CGr
Attached Images  
Old 03-06-2008, 04:23 PM
  #10  
Senior Member
Thread Starter
 
Alex7403's Avatar
 
Join Date: Jun 2004
Location: New york, NY
Posts: 1,594
Likes: 0
Received 1 Like on 1 Post
Default RE: battery doesnt charge

yup,
trying to charge for two days now and nada.
8v after two days of charging....
no wonder they have only 90 day warrenty.....

thanks anyway
glad to hear your opinions.
Alex

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
Trackbacks are Off
Pingbacks are Off
Refbacks are On


Thread Tools
Search this Thread

Contact Us - Manage Preferences 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.