IBM ThinkPad T40 notebooks are a new benchmark of computing performance, battery life and mobility. Work unplugged longer by combining the ThinkPad T40 high-capacity battery with the optional ThinkPad Ultrabay Slim Li polymer battery for all-day computing (up to 9.5 hours).??The unique IBM Embedded Security Subsystem, an IBM ThinkVantage Technology, is available on select models. This hardware and software solution can help safeguard data with encryption to virtually lock private information.

Specifications

Key Features
Processor  Pentium M 1.6 GHz 
Installed Memory  512 MB (DDR SDRAM) 
Hard Drive  80 GB IDE   
Display  14.1 in. TFT Active Matrix 

Processor
Processor Type  Pentium M 
Processor Manufacturer  Intel 
Processor Speed  1.6 GHz 

Motherboard
Bus Speed  400 MHz 

Memory
Installed RAM  512 MB 
RAM Technology  DDR SDRAM 
Max Supported RAM  2.048 GB   
Installed Cache Memory  1024 KB 

Hard Drive
Hard Drive Capacity  80 GB 
Storage Controller Type  IDE 

CD / DVD
CD / DVD Type  CD-RW/DVD-ROM 
Optical Drive Read Speed  24x (CD) • 8x (DVD) 
Optical Drive Write Speed  16x (CD) 
Optical Drive ReWrite Speed  10x (CD-RW) 

Display
Display Tech  TFT Active Matrix 
Display Size  14.1 in.   
Display Color Support  24-bit (16.7 million colors) 
Display Max. Resolution  1400 x 1050 

Video
Installed Video Memory  32 MB 
External Video Resolution  2048 x 1536 

Audio
Audio Output Type  Sound card 

Operating System
Recommended Use  Corporate Business, Small Business 
Platform  PC 

Technical Features
Input Method  Keyboard • Trackpoint • Ultranav 

Networking
Networking Type  Integrated Network Card 
Data Link Protocol  Bluetooth • Ethernet • Fast Ethernet • Gigabit Ethernet • IEEE 802.11a • IEEE 802.11b 

Modem
Modem Type  Network / Modem Combo 
Analog Modulation Protocol  ITU V.90 

Battery
Battery Run Time  7.5 Hour(s). 
Battery Technology  Lithium ion 

Dimensions
Width  12.25 in. 
Depth  10.91 in. 
Height  1.22 in. 
Weight  4.85 lb. 

Warranty
Warranty  3 Years 

Review

Pros: Solid, reliable, light and fast (as long as you have RAM)
Cons: None in comparison to other laptops
Bottom Line: This is a solid piece of machinery.

Source:
http://www.dealtime.com