CMOS BATTERY
Dell Inspiron 15R (5520 / 7520) CMOS Battery Removal and Installation

This how-to guide shows the removal and installation of the CMOS Battery on the Inspiron 15R (5520). If you need any of the parts spoken about they are linked at the bottom of the post. A small phillips head and flat head screw driver is the only tool needed for this repair.

 
Inspiron 7520 CMOS Battery
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