RE: Multiplex LN-5014 Charger Ships & Review  
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All Forums >> Radios, Batteries, Clubhouse and more >> Batteries & Chargers >> RE: Multiplex LN-5014 Charger Ships & Review
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RE: Multiplex LN-5014 Charger Ships & Review - 10/1/2005 10:40:53 PM   
crazymustang


 

Posts: 20
Joined: 10/7/2004
From: NEW YORK, NY, USA
Status: offline
quote:

ORIGINAL: mglavin

What kind of power source are you using?

If I follow, your having problems with every battery you've attempted to charge? And your noting disparaging voltage values as compared to other devices.


hi, Mike, i am using a "Meanwell" power supply with input 110 volt and output 11-15 volt, 18 amp, i bought this power supply from ebay. i had measured the voltage for both input and output, its reflecting input 123.1 volt AC, and output 12.8 DC.

while i am reading this forum, my 2 cell-1300 mah lipo, was cut off at 265 mah about 30 minutes !!! then i press and hold the "Batterytype/stop" button, it showed input 12.21 volt, and output as 7.70volt. i know my lipo pack is not feeding enough, so i reconnect and start the charge process again, its been 21 minutes with feeding 101 mah, and the voltage at the right hand corner shows 8.400 volts, and its still charging, but i am sure its going to stop pretty soon...

by the way, what is this voltage value at the right hand bottom corner during charging ??

and also, what is meant by "disparaging voltage values " ???

is there anything wrong with my LN-5014 ??

thanks again for your prompt reply, hope to hear back from you soon. thanks

(in reply to mglavin)
       Post #: 76

RE: Multiplex LN-5014 Charger Ships & Review - 10/2/2005 2:13:31 AM   
mglavin



Posts: 5200
Joined: 11/29/2001
From: Elverta, CA, USA
Status: offline 		Sounds like the power supply is a good one.

Voltage display bottom right hand corner is the voltage of the battery while under charge.

Disparaging voltage values=I was referring to the battery voltage difference you noted with your meter and other charger.

There maybe something wrong with your charger, I don't know for sure. Lets try this use the MPX charger to charge/cycle the 2-cell Li-po to determine its viability, use two charge/discharge cycles ending discharged and note the mAh capacity when finsihed. Its certainly plausible the battery itself is the problem, I suspect it is...

I'm assuming your setting the charger for 7.4 Li-Po with the appropriate capacity rating.

_____________________________

Michael Glavin
RCU Community Moderator
Hitec * Multiplex Field Representative

(in reply to crazymustang)
       Post #: 77

RE: Multiplex LN-5014 Charger Ships & Review - 10/2/2005 3:59:55 AM   
crazymustang


 

Posts: 20
Joined: 10/7/2004
From: NEW YORK, NY, USA
Status: offline
quote:

ORIGINAL: mglavin

Sounds like the power supply is a good one.

Voltage display bottom right hand corner is the voltage of the battery while under charge.

Disparaging voltage values=I was referring to the battery voltage difference you noted with your meter and other charger.

There maybe something wrong with your charger, I don't know for sure. Lets try this use the MPX charger to charge/cycle the 2-cell Li-po to determine its viability, use two charge/discharge cycles ending discharged and note the mAh capacity when finsihed. Its certainly plausible the battery itself is the problem, I suspect it is...

I'm assuming your setting the charger for 7.4 Li-Po with the appropriate capacity rating.



hi, Mike, thanks for your help, yes, the setting is correct, i set it at Lipo charge, 7.4 volt, at 700 mA . It is now 11:00pm in New York, its kind of late, but i still would like to try to do the cycling to determine the viability of the battery, using the same LN-5014 charger. and will let you know outcome. many thanks , Crazymustang

(in reply to mglavin)
       Post #: 78

RE: Multiplex LN-5014 Charger Ships & Review - 10/5/2005 12:58:44 PM   
CrocEnd


 

Posts: 498
Joined: 2/16/2003
From: Darwin, AUSTRALIA
Status: offline 		Here in Aussie they come in a differant name same configartion had mine for over a year.
Magic bit of gear.

(in reply to hilleyja)
       Post #: 79

RE: Multiplex LN-5014 Charger Ships & Review - 3/1/2006 6:08:18 AM   
jkkrobbins


 

Posts: 52
Joined: 12/15/2005
From: houston, TX, USA
Status: offline 		I just bought one of these. It's simple to program, but I have a few questions.

1) How does it "know" how many cells the pack is with NiCd and NiMh. How does it know what current to charge it to?
2) When it asks for charge, it's listed in amps, not mAh. Are they asking for the rate of charge, or the current of the cells? In other words, are they asking how fast to charge it or what current to pump into the battery?

(in reply to CrocEnd)
       Post #: 80

RE: Multiplex LN-5014 Charger Ships & Review - 3/1/2006 1:16:50 PM   
Topgun2mo



Posts: 1046
Joined: 1/10/2002
From: Slidell, LA, USA
Status: offline 		It is asking for the rate of charge you want to charge at. C= rate of charge in amps. Ex .5A = 500mAH

As far as pack voltage or number of cells, it just charges until the pack peaks so it really doesn't care what the cell count is. It is charging at a constant current, not constant voltage.

_____________________________

Mike Morgan

(in reply to jkkrobbins)
       Post #: 81

RE: Multiplex LN-5014 Charger Ships & Review - 3/1/2006 3:11:25 PM   
JNorton



Posts: 3135
Joined: 1/29/2002
From: Montague, MI, USA
Status: offline
quote:

2) When it asks for charge, it's listed in amps, not mAh. Are they asking for the rate of charge, or the current of the cells? In other words, are they asking how fast to charge it or what current to pump into the battery?

1000 mA = 1 amp so an 1100 mA cell is 1.1 amp a 600 mA cell is .6 A and so on. They are asking you to tell the charger how much current to use to charge with. The charger doesn't know what size the pack is.

John

_____________________________

Have desk ... Will Fly....
Saito Member #467

(in reply to Topgun2mo)
       Post #: 82

RE: Multiplex LN-5014 Charger Ships & Review - 3/2/2006 4:25:22 AM   
jkkrobbins


 

Posts: 52
Joined: 12/15/2005
From: houston, TX, USA
Status: offline 		Hmmm...Sounds like I'm hearing 2 different things. Is 5A the rate (5 Amps/hour), or am I pumping 5A into the battery? Also, how does the charger know the battery has peaked?

(in reply to JNorton)
       Post #: 83

RE: Multiplex LN-5014 Charger Ships & Review - 3/2/2006 10:34:36 AM   
JNorton



Posts: 3135
Joined: 1/29/2002
From: Montague, MI, USA
Status: offline 		mA = milliamps mAh = milli amps per hour. Same thing over time to measure or define capacity of the battery. You put mA or A form the charger into the battery = mA. The result of the charge over time is mAh. So if you took a 600 mAh pack and discharged it at 60 mA it would take 600/60 or 10 hours to discharge to .9 volt per cell.

John

_____________________________

Have desk ... Will Fly....
Saito Member #467

(in reply to jkkrobbins)
       Post #: 84

RE: Multiplex LN-5014 Charger Ships & Review - 3/4/2006 6:04:43 AM   
jkkrobbins


 

Posts: 52
Joined: 12/15/2005
From: houston, TX, USA
Status: offline 		I've used the charger quite a bit now. Straight forward with 2100mAh NiCd. I've cycyled a few of these batteries several times. 1A discharge and 5A charge, and the battery doesn't even get warm during the process.

Having trouble with an 1800 mAh NiMh though. I received the pack and of course it had no charge. I setup the charger, specified NiMh, and told it to discharge at 1A and charge at about 2.3A. The battery got hot enough that the shrink wrap started to melt.

Was this charge rate too high for NiMh? What's the rule of thumb for charge rate vs rating of battery vs type of battery?

(in reply to JNorton)
       Post #: 85

RE: Multiplex LN-5014 Charger Ships & Review - 3/4/2006 6:14:13 AM   
jkkrobbins


 

Posts: 52
Joined: 12/15/2005
From: houston, TX, USA
Status: offline 		One more issue - the battery stops charging after putting less than 100mAh into it. It keeps falsely detecting a peak. Anyone know the reason for this?

(in reply to jkkrobbins)
       Post #: 86

RE: Multiplex LN-5014 Charger Ships & Review - 3/4/2006 1:56:18 PM   
Mayday!Mayday!



Posts: 500
Joined: 8/28/2005
From: Columbus, OH, USA
Status: offline 		JK, I would charge the 2100 at 2.1 amps and the 1800 at 1.8.
A 5 amp charge is absurd.
Thats why the batteries are hot, it's too much.
What power source are you using for the charger? If you don't get a true 12 volts it will stop charging. BG

(in reply to jkkrobbins)
       Post #: 87

RE: Multiplex LN-5014 Charger Ships & Review - 3/4/2006 3:17:05 PM   
jkkrobbins


 

Posts: 52
Joined: 12/15/2005
From: houston, TX, USA
Status: offline 		I'm using a Pyramid power supply. I tried charging at the low rates and the battery is detecting a false peak. The pack is cold but gets hot in one spot - where the shrink wrap melted. I'm thinking a bad connection where it's hot?

(in reply to Mayday!Mayday!)
       Post #: 88

RE: Multiplex LN-5014 Charger Ships & Review - 3/4/2006 3:23:13 PM   
JNorton



Posts: 3135
Joined: 1/29/2002
From: Montague, MI, USA
Status: offline 		Max charge rates for NiMh should be 1C just like BigCatfish said. The 2nd 1800 mAh pack is new. The pack must be form charged at C/10 for 14 to 16 hours then discharged at C/5 till a .9 volt drop per cell or 3.6 volts for a 4 cell pack. Do this for 3 times. If you don't do this and try to charge it at at 1C rate or greater you risk ruining the pack as you've found out, also the pack will generally not reach it's full capacity.
John

_____________________________

Have desk ... Will Fly....
Saito Member #467

(in reply to Mayday!Mayday!)
       Post #: 89

RE: Multiplex LN-5014 Charger Ships & Review - 3/4/2006 3:37:15 PM   
JNorton