The exact position of the battery changes your weight distribution (duh), but also your weight transfer.
The distribution: weight directly over the axle is 100% (the actual battery weight) on the rear wheels, and nothing on the front.
As the same weight moves back toward the bumper, the rear weight goes up (over 100%) and cantilevers weight off the front wheels. If hung on a tray out the back, a 100 lb. battery could add 200 lbs. etc.

The transfer: The distance between the axle center and the battery affects how quickly the car rotates around the axle on launch - greater distance (high polar momentum) slows down rotation. This is both front-to-back, but also height - the box can be raised so that the trunk lid just closes.

Expect to observe and tweak your suspension setting as needed.