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Parallel Connection

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Old 09-14-2007, 10:11 PM
  #1  
mnrcaerobat
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Default Parallel Connection

To connect two lipos in parallel, do they have to be the same capacity? I want to know if I can hook a tanic 3 cell 2150 mah pack and a thunder power 3 cell 2100 mah pack in parallel. I think the tanic is rated 12C and the TP is 15C.
Old 09-15-2007, 03:09 AM
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Default RE: Parallel Connection

No, they just have to be the same voltage at the time of hooking them.
Old 09-26-2007, 12:32 PM
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Dr Kiwi
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Default RE: Parallel Connection

I think you are bound for trouble - though the initial voltage may be the same the cells are different in terms of internal resistance and one pack will drop more voltage under load (so they will be mismatched), and one will drain before the other.
Old 09-26-2007, 01:03 PM
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Red Scholefield
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Default RE: Parallel Connection


ORIGINAL: Dr Kiwi

I think you are bound for trouble - though the initial voltage may be the same the cells are different in terms of internal resistance and one pack will drop more voltage under load (so they will be mismatched), and one will drain before the other.
Sorry, but the electrochemistry will not permit this. The packs will discharge evenly in proportion to their stored capacity.

See www.rcbatteryclinic.com - article on parallel operation for detail explanation.

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