Samsung Galaxy S20 FE 5G Battery Replacement Guide

Hi everyone, welcome back to DIY GEARDO.

Today, we will show you how to replace the battery on the Samsung Galaxy S20 FE edition.

Before starting, make sure you have the correct tools for this repair. You can find the full tool list in the description.

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Compatibility and Model Numbers

This repair guide based on Samsung Galaxy S20 FE 5G mobile phone, but it is also compatible with Galaxy S20 FE 4g & S20 FE 2022 models too.

Compatible Mode Numbers l SM-G781B, SM-G781B/DS, SM-G781U, SM-G781U1, SM-G781W, SM-G7810, SM-G781N, SM-G781V, SM-G780F, SM-G780F/DSM, SM-G780G, SM-G781NK, SM-G781NK22

Tools You Need

• Heating pad / heat gun / hairdryer
• Suction cup
• Plastic card pry tools / opening picks
• Phillips PH000 screwdriver
• Adhesive (B7000 or double-sided back cover adhesive)
• Bonding clips or rubber bands (optional but recommended)

How to Find Tools and Parts

• Heating pad – https://amzn.to/3H0tHzJ
• Portable Heat Gun – https://amzn.to/4mszih1
• Clamps https://amzn.to/3GYJT4w
• STREBITO 142 Piece Repair Tool Kit https://amzn.to/3UO1jUx
• Glue | Adhesive https://amzn.to/46exVxe
• Compatible Battery https://amzn.to/3HL44Dh
• Silicone Work Repair Mat https://amzn.to/45Emz5l

Read More information on Essential Repair Tools

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Step-by-Step Battery Replacement Guide

Step 1 — Remove the SIM Tray and Prepare for Opening

Start by powering off the phone and removing the SIM tray.
Next, we will begin the back cover removal process.

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Step 2 — Heat the Back Cover

The back panel is held using strong adhesive, so gentle heating is required.

We are using a heating pad:

• Place the back cover facing down on the pad
• Select the Mobile Phone Heating option
• Allow it to complete the heating cycle

Alternatively, a heat gun or hairdryer can also be used—just make sure to heat evenly around the edges.

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Step 3 — Lift and Remove the Back Cover

Use a suction cup to create a small opening between the back cover and frame.
Once you have a gap, insert a plastic card pry tool and carefully cut through the adhesive around all edges.

Lift the back cover gently and place it aside safely.

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Step 4 — Remove the Main Board Frame & Wireless Charging Coil

Undo the nine screws securing the main board frame.
Use a pry tool to lift the wireless charging coil—there is adhesive under it, so go slowly.

While lifting the frame:

1. Lift the frame first
2. Then disconnect the wireless coil
3. Finally disconnect the battery connector

After this, remove the entire frame assembly.

Change Cracked Camera Lens in This Step

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Step 5 — Disconnect the Main Flex (Top Side)

Disconnect the top end of the main flex cable from the logic board.

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Step 6 — Remove the Old Battery

The battery is strongly glued to the housing.

• Apply light heat to soften the adhesive under the battery
• Insert a plastic card pry tool and carefully separate the battery from the frame

Be gentle—avoid bending or piercing the battery.
Once loose, lift and remove the damaged or swollen battery.

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Step 7 — Install the New Battery

Apply fresh adhesive to the body and place the new battery in the same position.

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Step 8 — Reconnect Cables and Reinstall the Frame

Reconnect the top end of the main flex cable.
Secure the battery connector.

Place the main board frame back into the body.
Ensure the wireless charging coil is properly connected by pressing the flex into the port.

Then secure all ten screws on the main board frame.

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Step 9 — Final Back Cover Installation

Before closing, check if the back cover still has good adhesive.
If not, apply B7000 glue or a new double-sided adhesive for a proper seal.

Place the back cover and press it firmly into position.

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Step 10 — Add Binding Clips

Use binding clips or rubber bands to tighten the back cover and hold it in place.
Leave it for several minutes to ensure the adhesive bonds properly.

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Your Samsung Galaxy S20 FE battery replacement is now complete!

We hope you enjoyed this repair guide.
If you have any questions, feel free to ask.
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Frequently Asked Questions

1. Why should I replace the Samsung S20 FE battery?

If your phone drains quickly, shuts down randomly, heats up, or the battery is swollen, replacing the battery can restore normal performance.

2. Can I replace the S20 FE battery at home?

Yes. With proper heating and the right tools, you can safely open the back cover and replace the battery by following this guide.

3. Is the S20 FE battery glued to the frame?

Yes. The battery is strongly attached with factory adhesive, so applying gentle heat is necessary before removal.

4. Will replacing the battery affect data on my phone?

No. Battery replacement does not erase your data.
Only avoid turning the phone on during the repair.

5. Is it safe to use a swollen battery?

No. If your battery is swollen, stop using the device immediately and replace it as soon as possible.

More Galaxy S20 FE Related Repair Guide
Check Out Our Galaxy S20 Ultra Repair Guide