Amazon.com: Renata CR2032AH1-MFR 3V Lithium Coin Battery HORZ 2-PIN for PC CMOS IBM ThinkPad A31 Series, IBM ThinkPad I -Series, IBM ThinkPad 2655-27A, IBM ThinkPad R50, R52 A31P T20 T21 : Health
Brothers, reunited. A31 left A30 on right. : r/thinkpad