Model #: 2623-D3U
Processor: Intel T2500 2.0GHz Core Duo
Motherboard Chipset: Intel Calistoga i945GM/PM
Hard Drive: 100GB 5400RPM SATA (Hitachi Travelstar HTS541010G9SA00)
Memory/RAM: 1GB (1,024MB) (configurable up to 4GB)
Screen: 15.0″ 1400 x 1050 SXGA+ (LG Philips LP150E05 – A2)
Graphics: ATI X1400 128MB
Optical Drive: Multi-Burner DVD recordable
Battery: 9-cell Ibm ThinkPad t60 Battery (extended life, protrudes from back of notebook)
Wireless: Intel PRO/Wireless 3945ABG (802.11 a/b/g), Bluetooth 2.0, InfraRed
User Input: Touchpad, Pointing Stick, UltraNav buttons, Fingerpring Scanner
Warranty: 3-years parts and labor, 1-year battery
Dimensions:
14.1″ screen config: 12.2″ x 10.0″ x 1.0-1.2″ (width x depth x thickness)
15″ screen config: 13″ x 10.6″ x 1.2-1.4″ (width x depth x thickness)
Weight: 6.4lbs (14″ T60 is about 5.2 lbs with a 6-cell battery and optical drive)
Ports:
3 USB 2.0 ports
dock/port replicator
Display-out
Ibm Thinkpad T60 AC adapter port
RJ-11 (Modem)
RJ-45 (Ethernet LAN)
Audio line out for headphone/speakers
Microphone
Slots:
1 Type II PC card slot
1 ExpressCard 54 slot
Buttons:
Power on/off
Volume up/down/mute (3 buttons)
Wireless on/off
ThinkVantage shortcut button (shortcut to system support, security and diagnostics suite)
Battery lock and release
Battery

I have the 9-cell ibm battery with the T60 being reviewed. It adds a bit of weight over the standard 6-cell thinkpad t60 battery and sticks out but if you want close to 4 hours of battery life with the 15″ screen model you’ll need this size. In using the T60 without Wi-Fi and at medium brightness (3rd notch of 7) it got 3 hours 42 minutes of battery life when used lightly (typing review, or idling). You can expect to get over 3 hours with Wi-Fi on and finishing a DVD with the 9-cell ibm thinkpad t60 battery shouldn’t be a problem, well, unless it’s Lord of the Rings.

The T60 14″ screen size will do much better in terms of time of battery life per cell because a smaller screen just drains less battery. My guess is the 6-cell battery for the T60 14″ will get you about what the 9-cell battery does for the 15″ — again, that’s just a mildly educated guess.