Amazon.com: IBM ThinkPad R40e Chinese Laptop Keyboard 08K4782 : Electronics
ThinkPad Withdrawal Book
Amazon IBM ThinkPad R31, IBM ThinkPad R32, IBM ThinkPad R40, IBM ThinkPad R40e, IBM ThinkPad R50 kompatybilny zasilacz sieciowy/Ładowarka (prąd stały) - Ceneo.pl
Aftermarket CMOS/BIOS (small) battery replacement on 2002-2003 IBM ThinkPad R40 - polarity of connector concern : r/thinkpad
Battery Replacement for IBM ThinkPad R32, ThinkPad R40 Part NO 02K6928, 02K7052, 02K7053