Lipo Battery
 

Hi Everyone,
Can anyone tell me if a 6s lipo 60C 5000 mAh can be connected in series with a 4s lipo 60C 5000 mAh to provide a power bank of 10s? Remarks: they have different maximum burst discharge rates, i.e. 6s (120C) and 4s (100C).
Many thanks in advance.
Otto

You can do it, but as the battery discharges the cells with less internal resistance will do more work ie. the cells will discharge at different rates.

Noted with thanks.

In parallel, that would happen. In series, they have identical current load.

Does it mean that it wouldn't matter if the cells have different max burst discharge rates?

It'll only matter if you're getting anywhere close to those discharge rates. Assume the combined pack has a discharge rate of the lowest rated cell in the series.

While this CAN be done, I don't recommend doing it unless you buy both packs brand new and make sure they are identical spec with same C rating and capacity, treating the combined cells as an individual pack and rotating the series connection between each use, more information here:
https://www.smc-racing.net/index.php...egory&path=166

I once damaged a brand new pack when I tried to run it in series with an older pack and the new pack over drained and ballooned on me :(

ive done enough runs with series batteries and always found that the battery that is the negative feed battery will always drain faster than the others no matter what the ir is, ( electronic gurs will say different i have real life hands on experience and a dead battery or 2)
0invest in some simple battery buzzers it will save you the cost f replacing a battery, its like $5 each.

oh really

Why would the negative terminal battery drain faster? Kirchhoff's first law states that the current will be identical through the cells. If that actually happened, then you'll have the same exact problem internal to multi cell packs.

I believe it's because the mass of the electron (negative charge) is only 0.0005486 amu and the proton (positive charge) is much heavier at 1.007276 amu which suggests energy flows from the negative terminal.... If I didn't observe the same phenomena myself, I would raise the same question, but there's a great discussion here which debates the flow of electricity where many scientists argue both directions:
https://www.douglaskrantz.com/ElecElectricalFlow.html

To summarize, any discussion about electricity from this post forward is a rabbit hole... the article I linked above from SMC is everything the OP needs to operate his 10S in series safely :)

Protons don't leave the cells, or even the lithium atom. The same electrons pass through all cells in the series circuit. The cells are chemically isolated from each other.
I tried viewing the article you linked but the site appears to be down.