ONE for iPad & Mac: What batteries are best to use for ONE ?

Apogee highly recommends using rechargeable NMiH ( Nickel -metal hydride ) batteries for 2 good reasons. 1. They last about 2 1/2 times longer than normal non-rechargeable AA batteries. 2. Rechargeable batteries are more environmentally friendly in that they are used over and over again for a long period.