6 Months Ago, CD Freaks.com says (in Lenovo ThinkPlus USB 2.0 CD-RW/DVD-ROM Combo II (Italy))  Netherlands
No external power adapter is required for read/write operations when the drive is connected to a single USB 2.0 port on ThinkPad notebooks. This slim and lightweight drive allows users to install or run software, listen to music or watch DVD movies. ...

And CD Freaks.com says (in Lenovo ThinkPad DVD-ROM Ultrabay Enhanced Drive (Serial ATA))  Netherlands
View DVD movies and install CD/DVD software with this optical drive option. Do you have a question about the Lenovo ThinkPad DVD-ROM Ultrabay Enhanced Drive (Serial ATA)? Ask our community members, we are sure they can help you. Ask a new question? ...

And CD Freaks.com says (in Lenovo USB 2.0 Super Multi-Burner Drive - Europe)  Netherlands
Reads and writes without an external power adapter when connected to two ThinkPad or Lenovo 3000 system USB 2.0 ports - this allows users to install or run software, listen to music, watch DVD movies or copy CDs or DVDs, drawing power via the USB ...

And CD Freaks.com says (in IBM HD 30GB 4200rpm f ThinkPad) Increase your hard drive capacity with a larger primary system hard drive, or add a second HDD to your ThinkPad notebook via the Ultrabay 2000 or Ultrabay Slim modular bays using the optional corresponding ThinkPad 2nd HDD adapter. ...
Lenovo HD 60GB 5400rpm f ThinkPad CD Freaks.com