Based on my understanding of precedents, no. Abilities without a duration last until the end of the phase, which (based on my understanding, though I have heard different interpretations) is until the end of the side battle, since each battle has its own 'battle phase'. Therefore, it would end and not continue through the rest of the main battle, to my knowledge.
I'd want to hear confirmation before taking that as fact, though, since there has been some fluidity in this matter.
