Newer Centrino 2 Processors based Notebooks offer real good battery backup time with mobile performances in comparison to AMD Turion ones. And AFAIK Turions tends to be hotter than Centrino 2s when using for a while, and needs more power to run leading to short battery life. So it is recommended to go for a Centrino 2 Processor.
The new processors fabricated using the Centrino 2 Technology are stated below for your information :
Performance : T9600, T9400
Power Optimized Performance : T9500, T8600, T8400, T7350
Low Voltage : SP9400, SL9400, SP9300, SL9300
Ultra Low Voltage : SU9400, SU9300
Look for these processors in the Laptops when buying.