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NIMH battery - 5/28/2008 11:08:52 PM   
nomak


 

Posts: 14
Joined: 4/16/2008
From: North Vernon, IN, USA
Status: offline 		I have a tower hobbies Nicd charger with a built in discharge mode on it. Can I discharge my NIMH batteries on this charger as well as my Nicd batteries ?? I currently use a mrc superbrain 960 to charge my nicd batts but am getting 2 new Nimh batts tommorow and wandering about discharging them as to cycling them.. thanks..
       Post #: 1

RE: NIMH battery - 5/29/2008 2:02:47 AM   
guver


 

Posts: 8975
Joined: 3/7/2003
From: LaGrange, OH, USA
Status: offline 		Your discharger should be able to discharge the nimh pack too (as long as all the "other" rules are followed)

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RE: NIMH battery - 5/29/2008 2:09:56 AM   
nomak


 

Posts: 14
Joined: 4/16/2008
From: North Vernon, IN, USA
Status: offline 		when u say other rules do umean no charging Nimh batts on the Nicd charger or is there something else as well.. thanks..

(in reply to guver)
       Post #: 3

RE: NIMH battery - 5/29/2008 2:40:37 AM   
guver


 

Posts: 8975
Joined: 3/7/2003
From: LaGrange, OH, USA
Status: offline 		I'm thinking of things such as making sure the cut-off,voltage, current, ect is within specs.

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RE: NIMH battery - 5/29/2008 5:31:04 PM   
nomak


 

Posts: 14
Joined: 4/16/2008
From: North Vernon, IN, USA
Status: offline 		I know nothing of the specs for the cut-off,voltage, current, ect ... its a cheap tower hobbies 420 model I think charger with a ammeter on it and a switch with charge and discharge on it..as for my superbrain I let it do its thing with the preset settings...im not very educated on the batteries part except dont charge nicd's on a nimh charger and vise versa and that when they get hot let em cool off ..bout far as my knowledge goes in this area.. thanks..

(in reply to guver)
       Post #: 5

RE: NIMH battery - 5/29/2008 5:51:48 PM   
DARKWAV



Posts: 306
Joined: 12/5/2007
From: San Diego, CA, USA
Status: offline 		Probably...but the Tower discription doesn't mention if it discharges at 5A or something less. Also it doesn't state what the cutoff voltage is, so you would need to somehow monitor pack voltage during discharge so you can stop it before voltage drops so low that the battery pack gets ruined. Smart dischargers allow you to set the voltage cuttof...commonly recommended at .9 V per cell (so that's 5.4V for a 6 cell pack).

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RE: NIMH battery - 5/29/2008 5:57:12 PM   
guver


 

Posts: 8975
Joined: 3/7/2003
From: LaGrange, OH, USA
Status: offline 		the 420 will discharge any battery ( I think you have standard 1/10 scale subC packs) within it's voltage spec and won't know the difference between a nicad or nimh battery. It is not recmmended to discharge packs.

< Message edited by guver -- 5/29/2008 6:02:32 PM >

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RE: NIMH battery - 5/29/2008 11:50:42 PM   
nomak


 

Posts: 14
Joined: 4/16/2008
From: North Vernon, IN, USA
Status: offline 		ok first question where can I find info on charging and discharging my batteries.. I thought I read somewhere that the nicd's required cycling (discharging and charging every so often) and the NIMH batts are new ball game to me.. dont know about the cycling of them.. the batts I own are tower hobbies brand 1500mah nicd's and the NIMH batts are 2000 mah prianha's..I assume these are Sub C packs that was mentioned in previous post.. thanks everyone for the info on this matter... greatly appreciated..

(in reply to guver)
       Post #: 8

RE: NIMH battery - 5/30/2008 12:23:37 AM   
guver


 

Posts: 8975
Joined: 3/7/2003
From: LaGrange, OH, USA
Status: offline 		Here's a couple of good links that may apply.

http://members.aol.com/davthacker/nimhfaq.htm#Your%20New%20Battery
http://www.rcbatteryclinic.com/

Many of the major batt manufactureres have faqs also , Check Sanyo, rayovak,energizer, duracell.

Nimh batts rarley need cycled and nicads need very little cycling. The way we use batts in electric cars/trucks for power gets them cycled during normal use far more than is nessecary.

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RE: NIMH battery - 5/30/2008 5:03:08 PM   
Tex Gehman


 

Posts: 46
Joined: 5/9/2007
From: Winnipeg, MB, CANADA
Status: offline 		If you can't find the specs for the charger, use it anyway. Just keep tabs on the charge process and feel it with your hand every few minutes. When it starts to feel a bit warm, they're done. Tex.

(in reply to guver)
       Post #: 10

RE: NIMH battery - 6/4/2008 4:38:15 PM   
roadrunner12


 

Posts: 5
Joined: 3/17/2008
From: Visalia, CA, USA
Status: offline 		Has anyone heard of certain battery packs not being compatible with digital servos. I am putting HT Digital servos in my YAK 120, and i don't want to have a conflict between my 2500 NiMH and my digital servos.

(in reply to Tex Gehman)
       Post #: 11

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