At scale production of secondary batteries intersects multiple disciplines ranging from high level economics, mechanical engineering, physical modelling and electrochemistry -to name a few. A key aspect in improving the overall productivity of a production line for any format cells is to identify and improve production bottlenecks . Whilst electrode coating, stacking and assembly are rather fast, the final production step of formation and aging may take up to 24 hours or longer .This is due to very low charge rates (C-rates) over multiple consecutive cycles, i.e. 18 -30 hours of total formation time to form a "good" Solid Electrolyte Interphase (SEI). These ultra slow charging rates upon formation, are less than a choice rather than a necessity as formation is known to be a prime failure point resulting in 5-10% rejection rates .The obvious strategy of simply charging cells faster during formation does however not work as higher formation currents lead to lower efficiencies as the SEI becomes less uniform and thicker . Even worse, cells may catastrophically fail due to the build-up of "dead Lithium" through plating or dendrites . Increased temperatures during formation are thus often used to access a more favourable mobility and diffusion regime of Li into vs. onto graphite . Recently optimization papers have shown that they can build SEIs through tuning the temperature and charge current to increase cycle life at the cost of capacity . This, again, shows that an increase of current leads to "thicker" and thus less reactive SEIs. Claims of up to 50% longer lifetime through formation tested by constant current constant voltage (CCCV) cycling will however need to be amended with calendaric aging and drive cycle testing . The inevitably higher SEI resistance caused by increased thickness would also limit maximum (dis)charge rates and it remains doubtful that extending the already long cycle life of automotive batteries would counteract lowered EV-range. Recent literature cautions on making claims about cell lifetimes based on coin cells can be misleading . This is why herein we demonstrate our formation protocol on 25Ah prismatic cells to demonstrate the applicability on realistic cell formats.