NEW BIOS CMOS 3V motherboard battery for IBM THINKPAD T40 T41 T42 T43 R51 R52 T60 T61 T400 _ - AliExpress Mobile
Amazon.com: Synergy Digital CMOS/BIOS Battery, Works with IBM ThinkPad T43 CMOS/BIOS, (Li-Ion, 3V, 200 mAh) Ultra High Capacity, Compatible with Evesham 02K6541 Battery : Electronics