Synergy Digital CMOS/BIOS Battery, Works with IBM ThinkPad R500 CMOS/BIOS, (Li-Ion, 3V, 200 mAh) Ultra High Capacity, Compatible with Evesham 02K6541 Battery - Walmart.com
IBM Lenovo ThinkPad R500 Bios Password Bin File
Download lenovo BIOS/UEFI drivers for lenovo R500 Laptop (ThinkPad)
Lenovo ThinkPad R500 Bios Password bin file - AliSaler.com