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All Forums >> Radios, Batteries, Clubhouse and more >> Batteries & Chargers >> MRC Charger Product Support (i.e. Super Brain, etc) >> Problem with Charger!
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Problem with Charger! - 5/11/2008 1:47:36 AM   
mikeyy300


 

Posts: 176
Joined: 11/24/2007
From: San Francisco, CA, USA
Status: offline 		I have an MRC Super Brain 960 and I am trying to charge a 3000mah battery and I have another one which is the exact same and it worked. Every time I press start it says error and I am sure the chords are connected. I think the problem may be that the voltage is so low that the charger just can't charge it. Before I press start it says the voltage is 0.07! On a 7.4 volt battery! Maybe this is the problem but if it is what do I do?
       Post #: 1

RE: Problem with Charger! - 5/11/2008 7:09:36 AM   
mikeyy300


 

Posts: 176
Joined: 11/24/2007
From: San Francisco, CA, USA
Status: offline 		Now it charges but only for a little before going into trickle mode! It charges for about 3 minutes then switches to trickle mode?!

(in reply to mikeyy300)
       Post #: 2

RE: Problem with Charger! - 5/11/2008 2:21:00 PM   
guver


 

Posts: 8541
Joined: 3/7/2003
From: LaGrange, OH, USA
Status: offline 		Low voltage on a battery like that usually indicates a bad pack , but you could try restarting the charger every time it stops. After a few times it may show 7 or 8 volts like it should. It might not fix it , but is worth trying. If the voltage never comes up then the pack or cell/cells, or connection is bad and may be able to be found with a dvm (voltmeter).

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RE: Problem with Charger! - 5/11/2008 5:25:09 PM   
mikeyy300


 

Posts: 176
Joined: 11/24/2007
From: San Francisco, CA, USA
Status: offline 		It charges now but only for a short period of time... Before going into trickle mode.

(in reply to guver)
       Post #: 4

RE: Problem with Charger! - 5/11/2008 5:40:28 PM   
guver


 

Posts: 8541
Joined: 3/7/2003
From: LaGrange, OH, USA
Status: offline 		If the voltage is now up where it belongs then it may need restarted (without unplugging) or chargeing with a manual charger for the first time. If the voltage isn't up then you may have a bad pack/cell/connection.

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RE: Problem with Charger! - 5/11/2008 5:45:11 PM   
mikeyy300


 

Posts: 176
Joined: 11/24/2007
From: San Francisco, CA, USA
Status: offline 		No. Now my problem is that it only charges for like 3 minutes before going into trickle mode, and the battery isn't hot yet. And lol hi guver Remember me? I was going to purchase a lipo batt and a charger and needed a duratrax converter thingy and you were going to sell me one cheap! Well I never got the lipo... Instead I got a brushless blackjack proboat! It's nice!

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       Post #: 6

RE: Problem with Charger! - 5/12/2008 6:21:35 PM   
Tim@MRC


 

Posts: 317
Joined: 7/24/2006
From: Edison, NJ, USA
Status: online 		Do you notice the battery voltage climbing really fast, or climbing a lot, say more than 4 volts? You don't say what rate you're using, but try charging at a lower rate.

Tim

(in reply to mikeyy300)
       Post #: 7

RE: Problem with Charger! - 5/13/2008 12:02:44 AM   
mikeyy300


 

Posts: 176
Joined: 11/24/2007
From: San Francisco, CA, USA
Status: offline 		It's a 3000mah batt and I'm charging at 3amps. Also at first it said 0.09 volts and now when its charging it says like 8.3 volts. And this is a 7.4 volt battery.

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

RE: Problem with Charger! - 5/13/2008 6:19:57 PM   
Tim@MRC


 

Posts: 317
Joined: 7/24/2006
From: Edison, NJ, USA
Status: online 		So is it holding the voltage, or is it falling off? The charger tripped off because it looked at the original voltage in the battery, and then the voltage it went to, and figured that something was wrong. You may have to hit the start button a few times in order for it to take a full charge. Keep checking the temp of the battery. Once it starts to get warm to the touch and it shuts off, it's done. This is NiMh battery?

(in reply to mikeyy300)
       Post #: 9

RE: Problem with Charger! - 5/13/2008 11:50:48 PM   
mikeyy300


 

Posts: 176
Joined: 11/24/2007
From: San Francisco, CA, USA
Status: offline 		ya nimh. But idk when its done bc i have done multiple charges bc it only goes for like 2 mins so now I dont know whether its right or wrong!

(in reply to Tim@MRC)
       Post #: 10

RE: Problem with Charger! - 5/16/2008 4:58:06 PM   
Tim@MRC


 

Posts: 317
Joined: 7/24/2006
From: Edison, NJ, USA
Status: online 		Sorry for the delay, I was out of the office for a few days. Is the battery getting warm at all? What charge rate are you using?

(in reply to mikeyy300)
       Post #: 11

RE: Problem with Charger! - 5/17/2008 1:28:04 AM   
mikeyy300


 

Posts: 176
Joined: 11/24/2007
From: San Francisco, CA, USA
Status: offline 		im using 3.0 amps. I cant tell if the battery gets warm bc i have charged it for many very short times and it doesn't get warm in that period

(in reply to Tim@MRC)
       Post #: 12

RE: Problem with Charger! - 5/19/2008 8:18:15 PM   
Tim@MRC


 

Posts: 317
Joined: 7/24/2006
From: Edison, NJ, USA
Status: online 		So if one battery worked fine, and the other won't charge for more than a few minutes, then I'd say it's definitley a problem with that battery.

(in reply to mikeyy300)
       Post #: 13

RE: Problem with Charger! - 5/20/2008 1:13:55 AM   
mikeyy300


 

Posts: 176
Joined: 11/24/2007
From: San Francisco, CA, USA
Status: offline 		I think I figured that one out a long time ago. I guess I can handle htis myself seeing as no one hear is giving me straight answers

(in reply to Tim@MRC)
       Post #: 14

RE: Problem with Charger! - 5/20/2008 2:46:53 AM   
guver


 

Posts: 8541
Joined: 3/7/2003
From: LaGrange, OH, USA
Status: offline 		It seems the pack was very low voltage for some reason. I'd try chargeing it with a wall charger at c/10 for 15 hrs .

Second choice is to use it dead and then keep restarting charger until a total of around 3000 mah has been put in. Allow it to trickle the full amount at the end (last charge).

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       Post #: 15