The Infapower C016 Intelligent Universal Charger is a versatile charger that is designed to charge a variety of rechargeable batteries, such as AA, AAA, C, D, and 9V sizes. It features intelligent charging technology that automatically detects the battery type and adjusts the charging current accordingly to ensure safe and efficient charging. The charger also has built-in safety features to prevent overcharging and short circuits. It is a convenient and reliable option for keeping your rechargeable batteries powered up and ready to use.