The Energizer Universal Charger is the ideal, versatile battery charger for all the family. It charges the five most popular battery sizes, so everyone always has the power they need. Charges AA, AAA, C, D and 9V rechargeable batteries Fast, safe charging to AA or AAA batteries from 3 to 5 hours LCD panel indicating charging status Bad battery detection and reverse polarity protection Safety timer to prevent over charge Energizer Rechargeable, the #1 selling rechargeable battery brand in the world based on scan data