A bit unconventional thinking but heres the way I see it.
589gram battery is good for aprox 1500W for 5 minutes using my rule of thumb that 10grams battery nets 25W power for 5 minute.
1500W / 4 is 375W per motor.
375W / 14.6VDC under load is 25.6 AMPS
Everything looks Kosher to me............