Different battery chemistries have different C-rates, which is the rate at which a battery can be charged and discharged: https://web.mit.edu/evt/summary_batte

Different battery chemistries have different C-rates, which is the rate at which a battery can be charged and discharged: https://web.mit.edu/evt/summary_battery_specifications.pdf https://web.mit.edu/evt/summary_battery_specifications.pdf https://batteryuniversity.com/index.php/learn/article/what_is_the_c_rate https://batteryuniversity.com/index.php/learn/article/what_i... And generally bigger battery packs can charge at higher kilowatts. Here's an electric ferry with a 4.1 MWh battery which can charge at up 6 megawatts. 600 amps at 10,000 volts: https://www.youtube.com/watch?v=rE_M1n-ClOA https://www.youtube.com/watch?v=rE_M1n-ClOA So, like the ferry, these aircraft probably have big batteries that they charge enough to get to the next destination with a buffer for emergencies. The closer you get to 100% state of charge the slower the system will charge in order to protect the battery.