What is CMOS battery
This battery allows the BIOS to maintain settings on the computer. These settings include recognizing hard drive settings�� USB on-board device settings and keeping your system clock on time. Usually�� the first visible sign that you need to replace the CMOS battery is that your laptop clock keeps losing time. A CMOS battery can last from three to five years.
Compatible with:
IBM Thinkpad 570 Series -- 570 570E 570X 570Z
IBM ThinkPad A Series -- A20 A20P A20M A21 A21E A21M A21P A22 A22M A22P A23 A30 A30P A31P
IBM ThinkPad T Series -- T20 T21 T22 T23 T30 T40 T60
IBM ThinkPad R Series -- R40 R40e R50 R50e R50p R51 R52 R60
IBM ThinkPad X Series -- X30 X31 X32
IBM xSeries -- 300 400
P/N: 02K6541 02K7087 02K7075 08K8050
Package : One pcs of Real Time Clock (RTC) CMOS Battery .
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