Energizer Camditioner CDC 100 Rechargeable Power System Nickel Cadmium batteries

Energizer Camditioner CDC 100 Rechargeable Power System for Nickel Cadmium batteries I have no information on functionality beyond what is seen on devices - see photos - instruction manual is not included Google search for info reveals: "AI Overview - The Energizer CDC100 is a universal camcorder battery conditioner and charging system. It's designed to work with various camcorder batteries and ensures they are properly conditioned and charged for optimal performance. The kit includes everything needed to charge and condition the batteries, and it's compatible with most camcorders and universal brands, according to a seller on eBay." originally sold by Eveready Battery Company, Inc., St. Louis, MO Made in China appears to be in good to very good preowned stored and used condition - circa 1990s Medium Gray Box 1