Using 20700 cells - "Introduced by Sanyo/Panasonic for use in portable power tools as higher-power and higher-capacity successor for 18650 cells". Nominal cell voltage is 3.6V / NMC chemistry so should not need any other conditioning besides the normal charge (CC/CV)
https://eu.industrial.panasonic.com/sites/default/pidseu/files/downloads/files/euro_cycle_eng_s_1110.pdf