New 10s LiPo battery solution for X02 #81

For the new X02 robot we require 10s batteries in comparison to our current 6s batteries: https://www.stefansliposhop.de/en/batteries/sls-quantum/sls-quantum-30c/sls-quantum-3500mah-6s1p-22-2v-30c-60c::1675.html

Long term @jgueldenstein is in contact with a startup, which could be providing us with 10s LiPos in the future.

But as a temporary solution we discussed, that we would buy additional 4s batteries to combine with our 6s batteries with a custom PCB, because there are no 10s batteries of the shelf.
This also allows us to keep using our current chargers, which support batteries up to 6s.

A 4s option with the same specs to be compatible with our 6s LiPo batteries would be:
https://www.stefansliposhop.de/en/batteries/sls-quantum/sls-quantum-30c/sls-quantum-3500mah-4s1p-14-8v-30c-60c::1673.html

However, it turned out, that actually there are 10s LiPo batteries:
https://www.stefansliposhop.de/en/batteries/sls-xtron/sls-xtron-stickpack/sls-xtron-5000mah-10s1p-37v-30c-60c-split::1077.html
But they are 2cm longer than the original batteries with dimensions: 345 x 80 x 115.
Additionally the batteries have 185Wh and the maximum allowed for flying is 160Wh: https://www.lufthansa.com/de/en/prepare-for-your-trip/baggage/electronic-devices-and-batteries