Maintenance-free batteries, also known as sealed lead-acid (SLA) or valve-regulated lead-acid (VRLA) batteries, are designed to minimize the need for regular maintenance. The design of maintenance-free batteries is specifically tailored to address common issues like electrolyte evaporation, which is. Despite their name, issues with maintenance-free batteriesare still possible. “Lower maintenance” simply doesn't have the same ring. Despite their low-maintenance design, maintenance-free batteries still require some attention to ensure they remain in optimal condition. Here are some services that are still necessary. While maintenance-free batteries offer numerous advantages over traditional lead-acid batteries, they are not entirely maintenance-free. Regular inspection, cleaning, testing, and.