ljhnba USB 5V to 1.5V AA Battery Eliminators USB Power Supply Cable Replace 1x 1.5V AA Battery for Electric Toy Clock LED Light

I see that there is already an answer but this works too: https://www.amazon.com/dp/B0DGX9HG7J I tried one of these battery eliminators and it can just fit with the wire coming through the release. It provides 1.5V 1A. Use it with portable battery and last a long time.