Galactus vs Cooler Geti Star in a physical fight

 
 Galactus uses his power to shrink down into the size of Cooler.  He can only use his power to alter his size and augment his speed and strength

Galactus can not fire energy beams: If he does he will loose energy (in-character trait)

 Vs... 

Galactus has to fight for as long as he can before his power dissipates. How long can Galactus fight? 

1. How well fed is Galactus

1. How well fed is Galactus

Fed enough to feel bloated that he needs to relax on his chair. 

@7am_Waking_Up_In_The_Morning: Galactus slaps around Cooler for a few months before he dies of starvation.