2 x 3S in series

Hi Guys,

I've got a question about LiPo's. Ok, so I want to convert my LST to brushless, on 6S LiPo. I want to run 2 x 3S LiPo in series, so 22,2V.

My Problem: My charger can only charge up to 5S LiPo.
So I have to charge and balance the 2 LiPo's on their own. I can't balance and charge them in series.

Now my question: Will this damage for the LiPo's, if I charge them seperately, and discharge them in series?

Thanks,

Patrick