The I-C3 (In-Cell Charge Control) 15-minute battery charger, model PS6, by Rayovac charges up to four AA or AAA Rayovac I-C3 batteries in 15 minutes, and other NiMH (nickel metal hydride) batteries overnight. (The company also sells the PS5, which charges two batteries at a time, and costs about $10 less.) It doesn't work with regular or rechargeable alkaline batteries.Once batteries are securely placed in the charger, the I-C3 detects whether charging is necessary. If so, a green LED light comes on to indicate charging is underway. A cooling fan also sounds - noticeably, but not distractingly - when it's operating. The only batteries that make Rayovac's 15-minute claim possible are its own. They really do charge in 15 minutes. In fact, on a couple of tests, they did so in less time. They are pricey though ($14.99 for an AA four-pack). The verdict: Assuming you can swing the cost of Rayovac's batteries, the I-C3 is a worthwhile investment for anyone who uses a lot of gadgets that require AA or AAA's. Any questions? Write us at firstname.lastname@example.org Sara Calabro writes Toy Box. She is a New York-based staff reporter for PRWeek ----- Price $40 (includes two AA Rayovac I-C3 batteries) Available at amazon.com, Wal-Mart, RadioShack, Toys R Us, Best Buy, CompUSA, Sears, Home Depot, Circuit City, and Target Specs The I-C3 15-minute charger is approximately 5" long, 3" wide, and 1" deep.