The Maha PowerEx MH-C808M is designed for today's ultra high capacity C & D batteries with rapid charging current. Charging time for a 11,000 mAh D battery is around 5 hours, while other products may take up to 40 hours to complete. Unlike other universal chargers, the Maha PowerEx MH-C808M uses rugged fixed contacts rather than spring-loaded ones, enhancing product reliability. It also features a rugged DIN power connector found only in professional products. It provides user with the option to choose between a soft charge and a fast charge mode. The Soft mode delivers the highest battery life and allows 100% compatibility with older, lower capacity batteries.