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Amazon.com: CMOS Battery for IBM Lenovo Thinkpad T60 T60P T61 T61P W500 W510 W700 X21 X22 X220 X220I X220T 02K6541 02K6572 - BIOS RTC 3V CR2032 Battery with 2 Pin 2 Wire
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Amazon.com: BZBYCZH 3V Motherboard Battery Compatible for IBM THINKPAD T40 T41 T42 T43 R51 R52 T60 T61 T400 CMOS Battery BIOS RTC : Electronics
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IBM LENOVO BATTERY T60 T61 Replacement CMOS Motherboard Guide - Install Fix Replace - Laptop - YouTube
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