977 charging and discharging Ni Mh batt  
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All Forums >> Radios, Batteries, Clubhouse and more >> Batteries & Chargers >> MRC Charger Product Support (i.e. Super Brain, etc) >> 977 charging and discharging Ni Mh batt
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977 charging and discharging Ni Mh batt - 3/27/2008 8:09:17 PM   
TwoGJoe


 

Posts: 8
Joined: 3/11/2002
From: Easton, MD, USA
Status: offline 		I have just purchased a 977 Super Brain. I would like to establish charge and discharge settings for (1) 4.8 four cell 1400 mah Nimh and (2) 4.8 four cell 3600 mah Nimh. The batteries are new and I understand that they need to be cycled. What settings do I use for the break-in and what settings do I use after the initial break-in ,or slow charge settings, and fast charge settings?



Thanks
       Post #: 1

RE: 977 charging and discharging Ni Mh batt - 4/2/2008 4:34:19 PM   
Tim@MRC


 

Posts: 317
Joined: 7/24/2006
From: Edison, NJ, USA
Status: offline 		For the first battery I would charge it at no higher than 1.4 amps for the initial charge, and the others I would charge at no higher than 3.6 amps for the initial charge. Just pay attention to the capacity going into the batteries, and the temperature of the batteries. If the charger shuts off and the batteries are still room temperature, then they're not fully charged. You can keep a running total of the MAH going in.

Tim

(in reply to TwoGJoe)
       Post #: 2

RE: 977 charging and discharging Ni Mh batt - 4/2/2008 9:55:29 PM   
TwoGJoe


 

Posts: 8
Joined: 3/11/2002
From: Easton, MD, USA
Status: offline 		Thanks Tim

(in reply to Tim@MRC)
       Post #: 3

RE: 977 charging and discharging Ni Mh batt - 5/29/2008 6:07:50 PM   
rctrax



Posts: 597
Joined: 5/11/2002
From: Mosinee, WI, USA
Status: offline 		Tim I have a 969 charger which is a couple years old but used very little as I can't seem to get consistent service out of it,so I have not used it much for fear of either harming my batterys or not haveing suffiecent power to fly with since I can't get consistent readings from it. Another issue is that the buttons don't seem to be making contact as I have to push them several times to make the display show the change. I understand that an upgrade to a 977 is available as an exchange for 42 dollars. If this is true I am considering the upgrade. I need a charger that I can depend on the readings I get when I charge for the next flying session. This one is all over the place when trying to get an idea of the status of my batterys. I have mostly NiMH which a couple of nicads mixed in.

(in reply to TwoGJoe)
       Post #: 4

RE: 977 charging and discharging Ni Mh batt - 5/29/2008 10:43:55 PM   
Tim@MRC


 

Posts: 317
Joined: 7/24/2006
From: Edison, NJ, USA
Status: offline 		Yes, we still offer the upgrade, although it's now $43.00 because of the increase in shipping costs. Please send it in with a check or a money order with your name, address, and phone number and we'll take care of it for you.

Tim

(in reply to rctrax)
       Post #: 5

RE: 977 charging and discharging Ni Mh batt - 6/3/2008 8:09:41 AM   
Creepin


 

Posts: 1
Joined: 6/3/2008
From: Beaverton, OR, USA
Status: offline 		I had a quick question about the 977 I just recently got back into electric, and picked up a tamiya drifter along with a 3200 Li-PO battery. I have the 969 and was going to send in for the 977, but is it worth it for the Li-PO features? OR am i still going to run into the same issues with the Li-PO and the 969. I am not really into "guessing" on a $100 battery

(in reply to Tim@MRC)
       Post #: 6

RE: 977 charging and discharging Ni Mh batt - 6/3/2008 3:47:33 PM   
Tim@MRC


 

Posts: 317
Joined: 7/24/2006
From: Edison, NJ, USA
Status: offline 		Here are the differences between the 977 and the 969. Read through them, I think the $43.00 is well worth it, but you can decide on that.

5 amps per channel instead of 4.5
10 amp power supply, so you can get the full 5 amps per output at the same time
soft touch buttons
4 amp discharge rate
Lithium specific setting

The power supply by itself retails for $25.00

Tim Sandor

(in reply to Creepin)
       Post #: 7

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All Forums >> Radios, Batteries, Clubhouse and more >> Batteries & Chargers >> MRC Charger Product Support (i.e. Super Brain, etc) >> 977 charging and discharging Ni Mh batt
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