A battery for an electrified vehicle according to an exemplary aspect of this disclosure includes, among other things, a battery housing, a battery module within the battery housing and extending in a transverse direction of the electrified vehicle, a plurality of battery arrays arranged within the battery module, the battery arrays arranged in a floating manner within the battery module, and a plurality of deformable supports, some of which are arranged in transverse spaces between adjacent ones of the plurality of battery arrays.