I want to take a rifle that has been in the back of my safe for several years hunting tomorrow but battery in this scope is dead and I no longer have the paperwork to look up how to change it. It's a Zeiss Victory 2.5-10x42 with a #60 illuminated reticle. Any help is appreciated. Thank you.

I have a V4, assuming the battery on your Victory is in the same place. There is a outer cap on the illumination dial, hold the adjust ring with one hand and unscrew the outer cap with the other