Battery cages are small enclosures used in industrial farming to confine hens for egg production. These cages typically house multiple birds in cramped conditions, limiting their movement and natural behaviors. The design aims to maximize space and efficiency in egg production. Critics of battery cages argue that they compromise animal welfare, as hens cannot engage in instinctive behaviors like nesting or perching. Some regions have implemented regulations to phase out battery cages in favor of more humane alternatives, such as enriched cages or free-range systems, which allow for greater freedom and better living conditions for the birds.