Introduction
Use this guide to replace the battery in your Nokia G42 5G.
For your safety, turn on your phone and allow the battery to discharge below 25% before starting this procedure. This reduces the risk of fire if the battery is accidentally damaged during the repair. If your battery looks puffy or swollen, take extra precautions.
Don't reuse the battery after it's been removed, as doing so is a potential safety hazard. Replace it with a new battery.
What you need
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Power down your phone and unplug any cables.
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Insert a SIM eject tool, bit, or a straightened paper clip into the small hole on the SIM card tray on the upper left edge of the phone.
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Press firmly to eject the tray.
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Insert an opening pick under the small notch in the SIM card tray slot.
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Position the opening pick at a steep downward angle between the back cover and the screen assembly.
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Slide the opening pick down the left edge of the phone to release the plastic clips.
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With the phone laying screen-side down, carefully lift the right edge of the back cover, opening it like a book.
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Lay the back cover next to the phone.
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Use a Phillips screwdriver to remove the 3.8 mm‑long screw securing the fingerprint reader bracket.
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Use a pair of tweezers or your fingers to remove the fingerprint reader bracket.
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Use the pointed end of a spudger to disconnect the fingerprint reader by prying the connector straight up from its socket.
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Remove the back cover.
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Use a Phillips screwdriver to remove the ten 3.8 mm-long screws securing the motherboard cover.
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Insert an opening pick under the right edge of the motherboard cover.
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Twist the opening pick to release the plastic clips.
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Use a pair of tweezers or your fingers to remove the motherboard cover.
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Use the flat end of a spudger to disconnect the battery cable by prying the connector straight up from its socket.
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Use your fingers to peel the two outer adhesive tabs off of the battery.
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Use your fingers to peel the center green pull tab off of the battery.
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Using one hand to hold the phone steady, use your other hand to slowly and steadily lift the center green pull tab up to separate the adhesive securing the battery underneath.
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Grab the bottom right edge of the leftover adhesive film and pull it towards the top of the phone with steady force to remove it.
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Apply isopropyl alcohol (>90%) to the old adhesive and use the flat end of a spudger to scrape it off.
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Remove the clear liner on the pre-cut battery adhesive and apply the sticky section to the battery well. Remove the opaque liner before continuing reassembly.
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Remove the battery adhesive film from its liners and apply it to the battery.
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Align the bottom edge of the battery (the edge without adhesive) with the bottom edge of the recess.
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Lower the battery down and press firmly to secure it in place.
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To reassemble your device, follow these instructions in reverse order.
For optimal performance, calibrate your newly installed battery after completing this guide.
Take your e-waste to an R2 or e-Stewards certified recycler.
Repair didn’t go as planned? Try some basic troubleshooting, or ask our Answers community for help.
To reassemble your device, follow these instructions in reverse order.
For optimal performance, calibrate your newly installed battery after completing this guide.
Take your e-waste to an R2 or e-Stewards certified recycler.
Repair didn’t go as planned? Try some basic troubleshooting, or ask our Answers community for help.
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