Original Laptop Parts CMOS For Lenovo ThinkPad X230 T430 T530 W530 T420i Edge E330 E335 L330 X1 Carbon 1st Gen 02K7078 - AliExpress
Amazon.com: Synergy Digital CMOS/BIOS Battery, Works with IBM Thinkpad T530 CMOS/BIOS, (Li-Ion, 3V, 200 mAh) Ultra High Capacity, Compatible with Evesham 02K6541 Battery : Electronics