In the robots we use DOGCOM 1350mAh 150C 6S 22.2V LiPo Accu - XT60 batteries. In May 2022 RTT bought 25 of these via droneshop.nl.
According to the manufacturer.
Please refer to these two sheets regarding handling a LiPo what_lipo_do_i_have.pdf and lipo_fires.pdf. Old LiPos can be discarded at a Afvalbrengpunten.