Charging lipos & wire gauge - RCCanada - Canada Radio Controlled Hobby Forum
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Old 07-22-2011, 11:35 AM   #1
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Charging lipos & wire gauge

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I need to be able to charge 4S lipos. I've read that the lipo's I'm getting can be charged up to 15C (someone elsewhere posted they did it at 12C with no issues but the specs on HK site says max 5C) and if so, I'd like to make sure I have an adequate extention wire setup (from battery to charger).

My question is:

I'm making the adapter wire to connect the lipo to the charger (bullet as opposed to deans) and was wondering what gauge wire I need? I've tried googling but can't seem to come up with the right phrase.

The battery itself is 10gauge and the ESC I'm using also has 10 gauge external so is this what would be recommended for charging purposes as well?

edit-these are the 4S 3300 Nano-techs.

Last edited by voyager_663rd; 07-22-2011 at 11:49 AM.
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Old 07-22-2011, 11:44 AM   #2
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Re: Charging lipos & wire gauge

You can but... most good lipos are 30-40C now and you're only charging at half that. I use 12 gauge on my high capacity charging wires and 16 on my smaller ones.

Also, keep in mind that charging (and crashing) are the most dangerous times for lipos. If you're using bullet then make sure you don't plug them in reverse polarity. Good chargers will detect this and refuse to charge though.
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Old 07-22-2011, 12:08 PM   #3
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Re: Charging lipos & wire gauge

12 guage will handle 16 amps continuos (20amp X 80%)
3.3amp (cell) X 5C = 16.5amp
I don't see a problem. Although I would only charge at 3, or 4C myself. 15min seems reasonable time to fill a fully depleted pack. If you only run down 60 - 80%, fill dime will be less.
I beleive running everything electrical to the max nameplate data, is only asking for problems, if not trouble.
Electrically speeking, try to run, and keep everything operating at, or below 80%.
Seems I learned that in trade school 34yrs ago. Still applies.

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Old 07-22-2011, 06:28 PM   #4
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Re: Charging lipos & wire gauge

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