Thanks ! Following up on the napkin :
The world final energy consumption (2018) [0] is around 9717Toe or 9,717*11.63=113,009TWh
1g for 70MW = 1T for 70TWh
113,009 / 70 = 1614
1614 ton of lithium every hour seems huge to me, does my calculations are wrong ?
[0] https://en.m.wikipedia.org/wiki/World_energy_supply_and_cons...