Amperage draw

i want to remove battery and cables to save weight on blown sand dragster thought of using drill batteries to power msd,shifter,and transbrake what should I look for to make this work thanks in advance Shannon.
I will be use in pro mag 44,and msd 7531 programmable 7 also plan to get altronics data logger Bosch has an 18 volt battery they say 6amp per hour battery would two of these work