Mediabridge Rechargeable AA / AAA Batteries Charger Kit - Includes 4 AA Rechargeable Batteries (Ni-MH) - IntelliCharger (Part# RBC-AAX4 ) INTELLICHARGER: Designed to extend the life of your AA or AAA rechargeable batteries and to provide the shortest charging time. 4 INDEPENDENT CHARGING CELLS: Provides the optimum charging current for maximum battery life. CHARGE FIRST: Fully charge the batteries when you first receive them to maximize potential lifespan. LOW SELF DISCHARGE: After fully charged before the first use, these batteries will hold 75% of their charge for up to 1 year. WARRANTY: Mediabridge provides a Limited 1-Year Warranty for the IntelliCharger Kit