Also see http://www.atruereview.com/rayovac/index.php The operative word here is 20000 MAH. MAH stands for Milli Amps per hour. In other words, how long the batteries last before a new charge is necessary. as I understand it, the radio shack AA batteries are 800 MAH while the rayovac 20000 MAH ones will last 2.5 times longer. Again, people have talked about the fact that using rechargeable batteries on the bookport may not give you as much information about the discharge rate as regular batteries, but I publish this for those people who like using them. Neal -----Original Message----- From: bookport-bounce@xxxxxxxxxxxxx [mailto:bookport-bounce@xxxxxxxxxxxxx] On Behalf Of David Bennett Sent: Wednesday, October 05, 2005 2:53 PM To: bookport@xxxxxxxxxxxxx Subject: [bookport] New Rechargeable Batteries News flash from RadioShack! For those of us who use a fair number of "AA" and "AAA" batteries in Book Port, personal CD or MP3 players, and the like, RadioShack has developed a new generation of metal hydride rechargeable batteries which are purported to last four times as long as Alkalines in digital cameras, may be charged in just fifteen minutes using the appropriate chargers, and may be charged at any time in their cycle which means they never need to be drained. It's estimated that they can be charged up to a thousand times. There are two sizes of chargers--a two-bay unit and a four-bay one, and these chargers will also support older metal hydride and Nickel Cadmium types, though these must be charged overnight. When charging the I-C3's, a green light and cooling fan will let you know that the process is going well. The fan shuts off at the end of the charging cycle. It is impossible to overcharge these batteries using the appropriate chargers, and you may want to simply trickle-charge batteries which you'll be needing soon, as they do self-discharge eventually. I hesitated to supply information about these items on the list, but who could possibly benefit more from these batteries than Book Port users, especially if they live up to the manufacturer's claims. Here's the description I obtained from Radioshack.com. By the way, it's easy to shop there online as their site is amazingly user-friendly for blind people. These amazing batteries were developed using a revolutionary technology, which allows them to charge in just 15 minutes using a RadioShack I-C3 charger! They deliver incredible power, making them ideal for high-tech devices like digital cameras, MP3 players, PDAs, handheld video games and more. In fact, they'll last up to 4x longer in your digital camera than regular alkaline batteries.* Plus, each one charges up to 1000 times! PRODUCT FEATURES: . 1.2V/800mAh Ni-MH Batteries . Batteries charge in any other Ni-MH charger, but at a slower speed *Actual performance may vary based on your digital camera All right, here's the ordering information you need: I-C3 four-bay 15-minute battery charger: Item 23-039 Price: $39.99 Includes two "AA" batteries. I-C3 two-bay battery charger: Item 23-038 Price: $29.99 Includes two "AA" batteries. Four-pack I-C3 "AA" batteries: Item: 23-532 Price: $24.99 Four-pack I-C3 "AAA" rechargeable batteries Item 23-534 Price: $24.99 The two-bay charger is quite compact and its AC power supply tucks out of place into the bottom of the unit, which is no larger than a talking clock. The larger unit has rather a clunky AC adaptor which must be plugged into the unit separately. Reminder: Both chargers come with two "AA" batteries, so if you only need a couple for your Book Port, additional battery purchases will be unnecessary. A fifteen-minute charging cycle should diminish the need for numerous sets of batteries. Hope some of you give these a try. I've gotten mine fairly recently, but they will definitely work well in the Book Port because my Book Courier operates wonderfully on them, and their charging capacity is far, far better than I've experienced with any other rechargeable battery. The chargers are hefty and well-built, and you get the feeling they were made to last. Finally, remember that the cooling fan's activities will alert you as to when the charging cycle has completed. Good luck, David Bennett