The Energizer Universal Charger is the ideal, versatile battery charger for all the family. It charges the five most popular battery sizes, AA, AAA, C, D and 9V rechargeable batteries, so everyone always has the power they need. This charger provides fast, safe charging for AA or AAA batteries in 3 to 5 hours. It features an easy-to-read battery fuel gauge that indicates how full the batteries are and when they are fully charged. The charger is powered from the mains and includes bad battery detection and reverse polarity protection, with a safety timer to prevent overcharging. It also has an LCD panel indicating charging status.