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Quickly charge AA and AAA rechargeable batteries with the Rayovac USB Battery Charger. The convenient charger for batteries features green LEDs that indicate when charging is complete or batteries are not inserted so you can keep tabs on charging status. Designed for AAA and AA rechargeable batteries, the Rayovac USB Battery Charger is equipped with automatic shut-off to prevent overcharging and help maximize battery capacity. Completely charge up to 8 AA or AAA NiMH batteries simultaneously with the 8 bay rechargeable batteries charger in as little as 7 hours (times may vary by NiMH battery).