Futaba 7C Lipo Question - HeliFreak
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Old 12-13-2011, 12:45 PM   #1 (permalink)
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Default Futaba 7C Lipo Question

I bought a 3s transmitter lipo for my 7C. The way I figure it the 9.6 volt pack that came with the transmitter would actually be about 8x1.4volts = 11.2 volts fully charged where as the lipo would be 3x4.2 volts = 12.6 volts fully charged. Is this too much voltage for this transmitter? Thanks for any input.
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Old 12-13-2011, 02:20 PM   #2 (permalink)
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On my old T9ZAP i have a 3s lipo pack and it works very well. No problem at all !!!
Also other people at the field use 3s and all is fine.
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Old 12-13-2011, 04:15 PM   #3 (permalink)
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I have a 7C that uses a 3S, 2500 mAh lipo and it works great! Nothing like 10 hours of run time before recharging!
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Old 12-13-2011, 04:17 PM   #4 (permalink)
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Thanks for the info guys. I thought about charging to the storage charge of 11 volts but that kind of defeats the purpose of having a lipo in it.
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Old 12-13-2011, 05:38 PM   #5 (permalink)
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get a life pack...lipos dont like being stored at full charge. They lose 20% capacity per year at full charge. Life packs dont care and can be deaply discharged and Have a lower voltage.

Hyperion 2100mAh TX LifePo4 pack...thats what I use. 10 hours run time no worries.
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Old 03-02-2012, 05:28 AM   #6 (permalink)
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I also use LiFe batt from HK, but only at 1800mah.
The question is, how low can I discharge this battery? I think this battery is rated at 3 - 3.3v, so I can use it until 9v. Is it correct?
What is the lowest working voltage for 7C ?
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