If you are using AA type cells, I doubt you'll be able to get 2.4A from your series-connected battery pack.
If you want to use that type/size battery, I suggest you build an 8p6s battery pack as follows:
1. Make 6 battery banks (i.e. connect 8 cells in parallel (i.e. all + on one bus metal wire/strip & all - on another bus metal wire/strip). <-- make 6 of those banks (48 cells required).
2. Connect each battery bank in series (i.e. connect the + of bank 1 to the - of bank 2, connect the + of bank 2 to the - of bank 3... etc until you have all of the banks wired in series. The first - (bank 1) and the last + (bank 6) are the metal wires/strips that you will connect to your motor (i.e. in the simplest connectivity arrangement for testing purposes).
When fully charged, that battery pack should power your motor for ~1 hour at the motor's maximum efficiency and deplete the battery to ~50% of full charge.
If you want the motor to operate less time, then remove an equal number of cells from each bank (e.g. 1 cell from 6 banks or 4 cells from each bank). If you want your motor to run longer, add an equal number of cells to each bank.