Battery placement

Out of curiosity, where do you folks who use electric motors place the battery in the boat? The obvious choice is under the aft deck of the boat because of proximity to the motor and ease of access, but intuitively that seems like a bad place for ballast. Would positioning near the mast step make enough of a difference in boat trim to make it worthwhile?
I realize you'd have to create a stable platform to mount a battery box up there and have the correct gauge cable to deliver enough current to the motor.
Bill Herrick (wherrick-at-stny.rr.com)
I realize you'd have to create a stable platform to mount a battery box up there and have the correct gauge cable to deliver enough current to the motor.
Bill Herrick (wherrick-at-stny.rr.com)