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Running 3 Lipos in series

Running 3 Lipos in series

Old 10-09-2013, 07:44 AM
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Smile Running 3 Lipos in series

Hi all, I'm new here and looking for a little advise. I tried a search and did not find anything.

2 2s lipos in series is common.

Is Three 2S batteries wired in series a bad idea?

I'm thinking these:

ZIPPY Flightmax 5900mah 2S2P 60C Hardcase Car Lipo

Wired with bullet connector jumpers. 2 back to back with the third on top makes the wiring easy with short runs and soldering the bullet connector on at 90 degrees to the wire keeps everything more compact.

Seems like sort of a pain to set up for 6s but for it is also able to be 2s or 4s as needed is great.

Anyone try this or see any potential problems with this?

Just casual bashing with the family, not racing.

Thanks for any help!
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Old 10-09-2013, 10:14 AM
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As long as they all hold near the same mah there isnt gonna be a problem...
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Old 10-09-2013, 10:20 AM
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I have seen saddle setups with room for paired 2s or 3s, even paired 4s. But there may be space and L/R balance issues with a set of 3 2s Packs.

What are you loading up?
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Old 10-09-2013, 05:33 PM
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Originally Posted by chadj1980
As long as they all hold near the same mah there isnt gonna be a problem...
Exactly. Can be a little tricky as the packs age-change and possibly have different cycles, both can change the actual capacities. Just be careful with run time, double check that all packs are charged, otherwise risk running the lower capacity pack down too low.

Resting voltage should be at least 3.6V per cell, 7.2V for a 2S pack, for good pack life, 3.7 & 7.4V is safer. Higher than the typical LVC under load, while running, of 3 to 3.2V or so per cell commonly discussed.

And a little off subject, but gearing should be changed some when voltage is changed. Lower gearing (smaller motor pinion) for higher voltage. Watch the temperatures. Of course the ESC must be and the motor should be rated for the increased voltage.
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