Sony 2500 mAh AA Rechargeable Nimh Batteries, 4-pack

Product Details:

• Ideal for digital products
• High capacity -- lasts 3 times longer than alkaline
• Designed for use with Sony’s advanced power charge
• 4 Pack
• 2500mAh

Work great... last as long as alkalines. I use them inside my P.C.s wireless keyboard and mouse, and charge them about every two months. Sony makes great stuff, give them a shot.