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Old Sep 08, 2004, 06:15 AM
ontheweekend
Sydney, Australia
Joined Jul 2004
202 Posts
My First Lipo, Need Help, Whats with the two wires? Photo Attached for reference

Hi there,

I recently bought my first lipo and charger (picture attached).

http://www.ontheweekend.com.au/personal/lipo1.jpg

http://www.ontheweekend.com.au/personal/lipo2.jpg

My question is this, whats the second wire for, or with Lipo's, do you not just charge straight into the normal connector?

The charger has a couple of standard connectors.

Can anyone tell me what is supposed to go where before I set myself on fire?

Also, the charge can charge as small as 0.5 amps, everywhere i read you should charge as slowly as possible.

The lipo is 11.1v 1900mah, wont that take days to charge at .5 amps?

Cheers
Rob
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Old Sep 08, 2004, 06:53 AM
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sarge's Avatar
Fayetteville, NC
Joined Dec 2002
2,239 Posts
Did you buy that LiPo for a very specific application? I don't recognize the connectors. If your charger has matching connectors, charge on the connector with the heavier gauge wire. Charging at .5 amps (500mah) will take about 4 hours if the batt is discharged to a high degree. You can safely charge at up to 1C, or in your case 1.9 amps/1900mah.
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Old Sep 08, 2004, 06:57 AM
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windface's Avatar
San Juan Marin Intl, Puerto Rico
Joined Jul 2002
765 Posts
The other plug is to monitoring the cell one by one.
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Old Sep 08, 2004, 09:58 AM
ontheweekend
Sydney, Australia
Joined Jul 2004
202 Posts
Quote:
Originally Posted by sarge
Did you buy that LiPo for a very specific application? I don't recognize the connectors. .
No, its just the connector the lipo came with, which I will have to change to fit the connector I have on the plane.

Thanks
Rob
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Old Sep 08, 2004, 10:14 AM
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gtstubbs's Avatar
Perth Westen Australia
Joined Jun 2003
443 Posts
Quote:
Originally Posted by ontheweekend
Hi there,

I recently bought my first lipo and charger (picture attached).

http://www.ontheweekend.com.au/personal/lipo1.jpg

http://www.ontheweekend.com.au/personal/lipo2.jpg

...
Cheers
Rob
How about a picture of the actual charger and its connections/connectors?

Are the charger and the pack som sort of matched set?

Any instructions with the pack and charger and what do they say?
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Old Sep 08, 2004, 01:50 PM
Registered User
Morristown,NJ
Joined Oct 2003
162 Posts
The "primary" connector is a Molex / Tamiya / Kyosho variation used in a few scant applications. (What country are you in?) The "monitoring/balancing" connector looks similiar to the PolyQuest connector available from www.aircraft-world.com which appears to be down right now. As far as charge rates, what sarge said ... it's somewhat a matter of how gentle you want to be to them.

Just got the site, check:
www.aircraft-world.com/shopexd.asp?id=2124
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Last edited by moyg; Sep 08, 2004 at 01:53 PM.
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Old Sep 08, 2004, 02:28 PM
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Flybyguy's Avatar
San Mateo, California, United States
Joined Jun 2002
1,069 Posts
When you change that connector, cut one wire, solder the new connector to it, then cut the other wire and solder the other wire.

As in, cut red wire, solder red from battery and red from new connector.

Then, black and black.

That way, there is no chance of shorting the battery out and having it go thermal on you.

Brian
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Old Sep 08, 2004, 06:38 PM
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Fred Bronk's Avatar
In Heli Wonderland
Joined Aug 1999
22,803 Posts
This should help with the charger; http://www.rcgroups.com/links/index.php?id=4535

Change the main connector for sure though. The Molex plugs are lousy.
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Old Sep 10, 2004, 09:47 PM
ontheweekend
Sydney, Australia
Joined Jul 2004
202 Posts
Many thanks for all the help, looks like i happened to buy a decent charge by mistake!

Cheers
Rob
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