Im new to this community, and recently i just got myself the 1000H with kingston 2GB ram upgrade. Although the 160gb version have trade off its higher capacity 6600mAH lithium-ion, but the 5600mAH lithium-polymer battery is a warm welcome (better charge cycles + lighter). 4-5 hrs should not be much prob if proper settings are applied, In terms of the looks of the newer battery, i think is acceptable. But at stock without window update i notice graphic slow down in terms of video playback. So take note on this issue. Currently working on my project to make it a portable gaming machine (not graphic intensive one please), hehe^_^ so far, super nintendo, capcom arcade emulators are working pretty well, except for PS one games, i so used to OpenGL when using Epsxe to play wif GT2 or Capcom vs SNK in desktop PC, real slow down when using OpenGL here.But seems that in this machine u need to use D3D plugin to optimize speed and visual. And beware of display sets if anyone still in search of 1000H 80gb version. A Happy User for 1000H 160GB.