R/C Tech Forums

Go Back   R/C Tech Forums > General Forums > Electric On-Road

Reply
 
Thread Tools Search this Thread
Old 10-24-2008, 08:29 AM   #1
Tech Adept
 
bboy's Avatar
 
Join Date: Feb 2008
Location: CA
Posts: 218
Default Charging problem with MuchMore charger

Hello,

I have the Muchmore charger and put in 4.5A to charge my NiMh (2packs of 4 cells in parrallel), and it can never ramp up to 4.5A, and charges only at 4.1A.

Does anyone know why?

Thanks!
__________________
Serpent 960-08 + Max XL9
XRay NT1 + Max XXL3
bboy is offline   Reply With Quote
Old 10-24-2008, 08:43 AM   #2
Tech Addict
 
cyclone speed's Avatar
 
Join Date: Jun 2008
Posts: 621
Default

Quote:
Originally Posted by bboy View Post
Hello,

I have the Muchmore charger and put in 4.5A to charge my NiMh (2packs of 4 cells in parrallel), and it can never ramp up to 4.5A, and charges only at 4.1A.

Does anyone know why?

Thanks!
Is it the cell master , if yes are you using it on a power suply or 12 volt battery.
If you running on 12v batt , check if the 12v is fully charged cause i have had this probleme .
Does it charge at 4.1 during all the charge or does it do funny things ?
cyclone speed is offline   Reply With Quote
Old 10-24-2008, 08:58 AM   #3
Tech Elite
 
sosidge's Avatar
 
Join Date: Dec 2001
Location: Bristol, UK
Posts: 3,865
Default

Quote:
Originally Posted by bboy View Post
2packs of 4 cells in parrallel
Please explain this. NiMH should only be charged in series, and only one pack at a time.
sosidge is offline   Reply With Quote
Old 10-24-2008, 11:13 AM   #4
Tech Adept
 
bboy's Avatar
 
Join Date: Feb 2008
Location: CA
Posts: 218
Default

I have the silent charger which plugs directly to the wall. So there shouldn't be a problem with the powersource.

As for the NiMh, I put 3 packs of 4 cells in series (I connect them with wires, neg to positve), and charge all 12 cells the same time since the charger handles up to 14 cells.

I notice it never goes all the way to 4.1A, and after a while, goes to 2.3A or something.

Is everything ok? I have the temp probe on the cells and it does not kickoff any alarms for high temp...
__________________
Serpent 960-08 + Max XL9
XRay NT1 + Max XXL3
bboy is offline   Reply With Quote
Old 10-24-2008, 11:14 AM   #5
Tech Adept
 
bboy's Avatar
 
Join Date: Feb 2008
Location: CA
Posts: 218
Default

Quote:
Originally Posted by sosidge View Post
Please explain this. NiMH should only be charged in series, and only one pack at a time.
Yes, sorry, in series, my bad.
__________________
Serpent 960-08 + Max XL9
XRay NT1 + Max XXL3
bboy is offline   Reply With Quote
Old 10-24-2008, 11:37 AM   #6
Tech Fanatic
 
94eg!'s Avatar
 
Join Date: Jan 2008
Posts: 832
Trader Rating: 17 (100%+)
Default

It's because you've reached the maximum wattage of the built-in power supply. Because the voltage is so high, the amperage must be reduced to keep within the power supplies rated wattage...

Watts = Amps x Volts

I would also imagine that as the cell voltage rises, the charge amperage might start to fall. Or perhaps the charger is smart enough to know that if it charges 12 Nimh cells in series, the power supply can only deliver 4.1a when they hit their peak voltage.

I'm guessing it's the later situation.

***edit: The max charge wattage for the AC/DC Silent Charger is 60watts. This means at 4.1amps, it can only support a peak voltage of 14.63v. If you had 14 cells, you would only be able to charge at about 3.6amps.

If you want to charge at a higher amperage, you must lower the cell count...
94eg! is offline   Reply With Quote
Old 10-24-2008, 11:44 AM   #7
Tech Addict
 
cyclone speed's Avatar
 
Join Date: Jun 2008
Posts: 621
Default

i remember having the same problem with another charger and i was charging a 12volt batt from the 240 power source and i set the amp at 5amp and it will on ly charge at 4.5 then 2 hours later 4 amp then 2 hours later 3.5 and on and on ....
cyclone speed is offline   Reply With Quote
Old 10-24-2008, 07:40 PM   #8
Tech Adept
 
bboy's Avatar
 
Join Date: Feb 2008
Location: CA
Posts: 218
Default

Oh.. so even though the charger can do it, if the power supply cannot, it is still a problem ... too bad. I was so excited to get the MM because I was hoping to charge 12 cells in series...

Thanks!
__________________
Serpent 960-08 + Max XL9
XRay NT1 + Max XXL3
bboy is offline   Reply With Quote
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
Team Magic G4 Motorman Nitro On-Road 11759 12-09-2016 06:09 AM
RC equipments for Sale ijnek Malaysian R/C Racers 22836 09-09-2009 02:50 PM
Team Much-More cell master v1 lee82gx Electric On-Road 1656 05-22-2009 08:16 AM
"Batteries Gone Wild" SWTour Electric On-Road 40 09-20-2007 11:34 PM
Muchmore CTXC : check clip uniquexme Electric On-Road 16 04-27-2006 08:27 PM



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search

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 On
Pingbacks are On
Refbacks are Off



All times are GMT -7. It is currently 09:34 AM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
Powered By: vBulletin v3.9.2.1
Privacy Policy | Terms of Use | Advertise Content © 2001-2011 RCTech.net