Dell Inspiron 15 (7548, Late 2014) - Manual (Page 27)

Removing the Coin-Cell
Battery
WARNING: Before working inside your computer, read the safety
information that shipped with your computer and follow the steps in
Before Working Inside Your Computer . After working inside your
computer, follow the instructions in After Working Inside Your
Computer . For more safety best practices, see the Regulatory
Compliance home page at dell.com/regulatory_compliance.
CAUTION: Removing the coin-cell battery resets the BIOS settings to
default. It is recommended that you note the BIOS settings before
removing the coin-cell battery.
Prerequisites
1 Remove the base cover .
2 Remove the battery .
Procedure
1 Lift the mylar tape off the coin-cell battery.
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