Ok, thank you
Yes, you answered your own question, T60 has a great Panasonic 9 cell battery that works for 5 hours with T60 (due to Intel and T1300 processor i think). T61 is working max 2.5 / 3 hours due to the battery eating Nvidia Quadro.
I don't need ATi / Nvidia graphics anyway because i don't run any GPU intensive tasks ( i have a Playstation 3 for gaming
And about the T1300, it is slow indeed, when i copy some big ISO image from my fileserver the T60 is very slow because the CPU is stressed to 100%. I almost have the deal completed for a T2300