Dell Inspiron 15-3521 Battery Replacement

Introduction

After extended periods of time, laptop computer batteries will lose the ability to hold a charge and may need to be replaced with a new battery.

We are removing the battery to avoid the possibility of an electrical discharge when working with this system.
Flip the laptop over.
Slide the latches toward the outside of the laptop to unlock the battery.
Lift the battery out of the laptop.

Conclusion

To reassemble your device, follow these instructions in reverse order.

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Can I fix the cell of the battery?