Compatibility Information | Designed For | IBM ThinkPad 600E ¦ IBM ThinkPad R50 ¦ IBM ThinkPad R50e ¦ IBM ThinkPad R51 ¦ IBM ThinkPad T21 ¦ IBM ThinkPad T40 ¦ IBM ThinkPad T41 ¦ IBM ThinkPad T42 ¦ IBM ThinkPad T43 ¦ IBM ThinkPad X40 ¦ Lenovo ThinkPad A20m ¦ Lenovo ThinkPad R40 ¦ Lenovo ThinkPad R50e ¦ Lenovo ThinkPad R51 ¦ Lenovo ThinkPad T30 ¦ Lenovo ThinkPad T40 ¦ Lenovo ThinkPad T40p ¦ Lenovo ThinkPad T41 ¦ Lenovo ThinkPad T41p ¦ Lenovo ThinkPad T42 ¦ Lenovo ThinkPad T42p ¦ Lenovo ThinkPad T43 ¦ Lenovo ThinkPad T43p ¦ Lenovo ThinkPad X23 ¦ Lenovo ThinkPad X24 ¦ Lenovo ThinkPad X30 ¦ Lenovo ThinkPad X31 ¦ Lenovo ThinkPad X32 ¦ Lenovo ThinkPad X40 ¦ Lenovo ThinkPad X41 ¦ Lenovo ThinkPad X41 Tablet |