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bq20z45 .dfi/.rom file

Other Parts Discussed in Thread: BQ20Z45

We have a valid .dfi file used for a bq20z45 production battery pack.  Our customer requested a modification of one of the flash parameters.  It should be a simple process to create an updated .dfi file, but all we have in house are production packs, which are sealed.   My question is, is it possible to use a .dfi or .rom file created from a previously sealed and now unsealed board for production?  Will packs programmed using a .dfi file created from a previously sealed pack be sealed when they are reset?  Thanks.  Joe P.