amd's desktop-oriented athlon 64 x2 dual-core chips would be tough on a battery because they can consume from 89 to 125 watts and run from 2 ghz to 3.2 ghz.
The AMD Turion 64 X2 is a dual-core chip that only uses 31 to 35 watts to run from 1.6 GHz to 2.2 GHz.