Samsung Galaxy Note 20 Ultra | Battery Replacement Repair Guide

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OVERVIEW:

In this tutorial, we walk you through the step-by-step process of replacing the battery on a Samsung Galaxy Note 20 Ultra. Whether your device is no longer holding charge or you’re noticing performance issues, a battery replacement can help restore functionality. The process involves heating the device to loosen adhesive, carefully removing the back glass, and disconnecting various flex cables. With patience and the right tools, this repair is achievable. Follow our in-depth teardown to safely complete the repair.

See the official Samsung specs for this model

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REPAIR TIME & SKILL LEVEL:

This repair is estimated to take about 1 to 2 hours to complete and is of INTERMEDIATE difficulty, requiring careful handling of adhesive and internal flex cables.

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STEPS:

Tools You Need

For this repair, you will need a heating mat set between 60 to 80 degrees Celsius (or a heat gun), isopropyl alcohol to loosen adhesive, a plastic card for back glass removal, and a Phillips screwdriver to remove internal screws.

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Warm Up the Device

• Place the Samsung Note 20 Ultra on a heating mat set to 60–80°C to loosen the adhesive under the back glass.
• Let the device sit for 5 minutes to ensure the adhesive softens adequately.
• Flip the device over to allow even heat distribution across the surface.

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Loosen the Back Glass with Isopropyl Alcohol

• Apply a small amount of isopropyl alcohol around the edges of the back panel.
• This step makes it easier for the plastic card to slide in without damaging the glass.
• Allow a few seconds for the alcohol to seep in before proceeding.

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Remove the Back Glass

• Gently insert the plastic card between the frame and the back glass.
• Slowly work your way around the perimeter to release all adhesive.
• Take extra caution around the curved edges to avoid cracking the already damaged glass.

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Unscrew the NFC Wireless Charging Pad

• Use a Phillips screwdriver to remove all screws securing the NFC wireless charging pad.
• Carefully lift the pad from the body without pulling on the connected flex cables.
• Set the pad aside in a safe place.

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Disconnect the Battery and Other Flex Cables

• First, disconnect the battery connector from the board.
• Then detach the main Flex cable, the antenna module cable, and the LCD Flex extension.
• Ensure all connections are lifted gently to prevent tearing.

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Remove the Loudspeaker Module

• Use your Phillips screwdriver to remove the screws holding the loudspeaker in place.
• Gently pry the speaker out, starting from the bottom edge.
• Be sure not to damage the speaker mesh or surrounding connectors.

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Disconnect Bottom Flex and Apply Alcohol

• Detach the bottom portion of the main Flex cable and antenna cable.
• Apply a bit more isopropyl alcohol around the battery edge to loosen adhesive.
• Let it sit briefly before proceeding with removal.

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Reheat to Loosen Battery Adhesive

• Reheat the device again on the heating mat for another 2–3 minutes.
• Maintain the temperature between 60–80°C to soften the battery adhesive.
• Do not overheat the device, as it may damage internal components.

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Remove the Old Battery

• Use a pry tool with a concave tip to lift the battery safely from the chassis.
• Pry from the side slowly, avoiding puncturing or bending the battery.
• If it’s difficult to lift, apply more alcohol and wait before trying again.

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Reinstall the New Battery

• Carefully press the battery into the new screen housing.
• Ensure all adhesive is properly aligned and firm.

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Reconnect All Flex Cables

• Begin reconnecting the bottom antenna module, LCD extension cable, and main board Flex cable.
• Snap each connector in place carefully, ensuring a firm connection.
• Then reattach the battery connector to the board.

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Reinstall the NFC Wireless Pad

• Position the NFC wireless charging pad back into place.
• Secure it using the original screws.
• Make sure no cables are pinched or misaligned underneath.

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Close Up the Device

• Align the back glass with the frame and press it down gently.
• Use clamps or light pressure to help the adhesive bond if needed.
• Ensure the back glass is flush and secure before turning the phone on.

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CONCLUSION:

Replacing the battery on the Samsung Note 20 Ultra can breathe new life into a sluggish or short-lived device. While the process requires careful disassembly and reassembly, following each step closely will ensure a smooth experience. Remember to handle all flex cables and connectors gently. Take your time with heating and adhesive removal to avoid any accidental damage. With the right tools and patience, you can complete this repair confidently.

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VIDEO TUTORIAL

Looking for a more in-depth tutorial? Check out our complete teardown video for a detailed step-by-step walkthrough.

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MAIL-IN REPAIR SERVICE:

We offer professional battery replacement services. If you’re unsure about doing this repair yourself, send your device to our expert technicians for fast and reliable repair.

https://tekdep.com/device-repair/

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SHOP PARTS:

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SHOP TOOLS:

Using precision tools ensures a safe and efficient repair. Always use the right tools to prevent damage to delicate components.

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HAVE QUESTIONS?

If you have any questions, leave them in the comments below. Our community and team will be happy to help!

• Phone: 818-456-4479
• Email: [email protected]

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