The lifetime of the launch abort battery is indeed a factor. It is normally rated for 20 days, and they extended the rating to 25 days for this launch, but when that time is up the entire vehicle stack does need to be rolled back to the VAB to access and (replace? recharge? retest?) the battery.

However, my understanding is that the current rollback is needed to address the hydrogen leak; they are not (quite) yet at the end of the rated battery lifetime.