Dell Inspiron 17-3721 CMOS Battery Replacement

Introduction

Over time, a laptop's CMOS battery will stop holding it's charge and eventually die out. This guide will show how to remove and replace the CMOS battery of the device.

What you need

Step 1 CMOS Battery

Dell Inspiron 17-3721 CMOS Battery Replacement, CMOS Battery: step 1, image 1 of 3

Dell Inspiron 17-3721 CMOS Battery Replacement, CMOS Battery: step 1, image 2 of 3

Dell Inspiron 17-3721 CMOS Battery Replacement, CMOS Battery: step 1, image 3 of 3

Remove the two 6.5 mm PH1 Philips head screws on the back panel.
Lift up the small panel from the top, using the plastic opening tools if necessary.

Edit

Step 2

Remove the CMOS battery with the plastic opening tools.
Be careful while prying it open, the battery holder can break if you use too much force.
Do not use metal tools when touching anything that can have an electric charge.