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Sep 08, 2004, 05:15 AM
ontheweekend

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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Sep 08, 2004, 05:53 AM
Suspended Account
sarge's Avatar
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.
Sep 08, 2004, 05:57 AM
Registered User
windface's Avatar
The other plug is to monitoring the cell one by one.
Sep 08, 2004, 08:58 AM
ontheweekend
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
Sep 08, 2004, 09:14 AM
Registered User
gtstubbs's Avatar
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?
Sep 08, 2004, 12:50 PM
Registered User
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
Last edited by moyg; Sep 08, 2004 at 12:53 PM.
Sep 08, 2004, 01:28 PM
Go Giants!
Flybyguy's Avatar
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
Sep 08, 2004, 05:38 PM
Our Daddy and Heli Junkie
Fred Bronk's Avatar
This should help with the charger; https://www.rcgroups.com/links/index.php?id=4535

Change the main connector for sure though. The Molex plugs are lousy.
Sep 10, 2004, 08:47 PM
ontheweekend
Many thanks for all the help, looks like i happened to buy a decent charge by mistake!

Cheers
Rob


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