LeFix CMOS RTC BIOS Battery Compatible with Lenovo Thinkpad T60 T60P T61 T61P R50 R51 R52 R53 R60 R60e R61 R61i T400 T500 R400 R500 T410 T410i T410s T420 T420i T420s T430 T430i |X220 X220i X230 X300;