Introduction
Use this guide to replace the battery of your LG Optimus L90. Replacing the battery is helpful when your battery shows diminished capacity or is no longer able to hold a charge.
Tools
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Carefully slide an opening pick between the the rear cover and the body of the phone.
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Using the pick, separate the cover from the back of the phone.
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Remove the rear cover.
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Insert a plastic opening tool int o the small recess at the bottom of the battery.
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Use the plastic opening tool to lift up the bottom of the battery.
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Remove the battery from the phone.
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Conclusion
Once you have placed your phone case back on your device, it should be fully functional.