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« on: May 20, 2020, 04:24:34 PM »
Somnath Maji
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I have Nikko Sky Ace RC helicopter, which had 02 Nos. of 9.6v  ni-mh 350 mah battery pack. Both are totally damaged at present.
So, where do I get the battery?
If I replace the same with li-po battery (11.1v 850 mah 25C or higher mah capacity cell) - is it safe?
Please, give useful suggestion.
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« Reply #1 on: May 20, 2020, 07:48:02 PM »
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Sure but 850 mah would be heavy for it.
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« Reply #2 on: May 20, 2020, 07:48:33 PM »
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If it's 3 cell
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« Reply #3 on: May 21, 2020, 06:49:09 AM »
Somnath Maji
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First I would like to thank you for giving your valuable suggestion.
In 2 cell Lipo, we get >7.4v and in 3 cell we get >11.1v.
But the Sky Ace cell capacity is 9.6v - so which cell Lipo pack should I choose?
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« Reply #4 on: May 22, 2020, 11:18:20 PM »
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It's better to explain if you post a photo
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« Reply #5 on: May 23, 2020, 12:10:42 PM »
Pundinas
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Yes!
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« Reply #6 on: May 24, 2020, 12:31:33 AM »
pnkyjs
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2S would be a closer choice, because Fully charged it will be 4.2+4.2= 8.4 volts, that's closer to 9.6 volts, 

3s would be 12.6 fully charged which is on the dangerous side. 

And you may not discharge below nominal 3.85 volts per cell , 3.85 + 3.85 + 3.85 = 11.55 which is also higher than 9.6volts so not recommended.
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« Reply #7 on: May 24, 2020, 12:34:09 AM »
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And why are you replacing 350 mAh with 850mAh ?  That would be too heavy.

2S 350mAh to 450 mAh lipo should fly.
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« Reply #8 on: May 24, 2020, 12:36:21 AM »
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Getting a Lipo with a high C value would help you.
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« Reply #9 on: May 24, 2020, 04:28:17 PM »
Somnath Maji
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OK getting the suggested battery after lock down ends. Thanks for help, with regards.
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