Battery box stores or houses a battery, typically a lead–acid battery. Battery boxes are typically constructed in two parts, a base and a lid. The base serves as a containment reservoir to prevent the batteries from shifting during transportation and to collect spilled electrolyte from wet cell lead-acid batteries. The lid allows for access to the batteries for performing battery maintenance (i.e. cleaning battery terminals) or altering the battery cable configuration, and protects batteries from environmental elements such as sunlight (UV), rain, salt water, dirt, oil, and gasoline. Battery boxes are commonly used in applications where batteries need to left in an outside environment or where the batteries could be subject to water or other elements.