Chapter 126: Brothers (2)
Zeus' memories were shattered as he wasn't in a proper version like Hades.
While Hunter had a proper inheritance and memories within himself that had given him a lot of strength to match Zeus' fragment's might, Zeus searched his memories to find the reason for his brother's hatred. He quickly came to understand that he was just a mere fragment and that something must have caused him to be weaker.
But that didn't change his love for Hades.
At least this fragment of memories had the early years of their brotherhood. He couldn't find anything but love and their struggles to become divinities. It didn't mean his power of lightning was gone.