Samsung Galaxy A70 Battery Replacement Guide | Galaxy A70S

If your Samsung Galaxy A70/A70s battery drains quickly, overheats, or the phone shuts down unexpectedly, replacing the battery can restore performance and extend the device’s lifespan. Over time, lithium batteries degrade naturally after hundreds of charge cycles, leading to reduced capacity and unstable performance.

This detailed step-by-step DIY repair guide explains how to safely replace the battery using common mobile repair tools. Whether you are a beginner learning smartphone repair or an experienced technician, following proper heating and disassembly techniques will help prevent accidental damage.

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• Best Rated Case https://amzn.to/42GYY28
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Repair Overview

Repair Difficulty ⭐⭐⭐☆☆ — Moderate Difficulty

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Reasons for Samsung Galaxy A70 Battery Replacement

You may need to replace the battery if you notice:

• Battery draining very fast
• Phone shutting down even with charge remaining
• Device overheating during charging or usage
• Battery swelling causing back cover lifting
• Charging percentage jumping suddenly
• Device not powering on properly

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Before You Begin

Compatibility and Model Numbers

• Samsung Galaxy A70
• Samsung Galaxy A70S

This repair guide based on Samsung Galaxy A70 Model.

Model Numbers | SM-A705F, SM-A705FN, SM-A705GM, SM-A705MN, SM-A7050, SM-A705W, SM-A705YN, SM-A705X, SM-A705U, SM-A707F, SM-A707FN, SM-A707GM, SM-A707MN, SM-A7070, SM-A707W

Tools Required

• Mobile phone heating pad or hairdryer/heat gun
• Plastic pry tool / card pry
• Suction cups
• Phillips #00/#000 screwdrivers
• Tweezers (for connectors)
• B7000 glue or double-sided adhesive (for back cover)
• Rubber bands or bonding clips to secure the back cover

Using proper tools reduces the risk of damaging the phone.

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 Parts –
  • Battery – https://amzn.to/4ogQEhS
  • Screen – https://amzn.to/43nafEZ
  • Other Parts – https://amzn.to/4oqla9h
• Silicone Work Repair Mat https://amzn.to/45Emz5l

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Step-by-Step Samsung Galaxy A70 Battery Replacement

Step 1 — Power Off the Device

Switch off the phone completely before beginning the repair to prevent electrical damage or short circuits.

Remove the SIM tray if necessary.

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Step 2 — Heat the Back Cover

Apply gentle heat around the rear cover edges to soften the adhesive securing the back panel.

You can use:

• Heating pad (recommended)
• Heat gun
• Hair dryer

Place the back cover side on the heating pad and allow heating until the adhesive softens.

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Step 3 — Remove the Rear Cover

Use a suction cup to create a small opening between the frame and the back cover.

Insert a plastic pry card into the gap and carefully slide it around the edges to cut through the adhesive.

Slowly lift and remove the rear cover.

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Step 4 — Remove the Midframe

Remove the 14 Phillips screws located on the top and bottom sections.

Using a plastic pry tool:

• Work gently around the edges.
• Release all plastic clips securing the midframe.

Lift and remove the frame carefully.

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Step 5 — Disconnect Battery Connector

Locate the battery connector on the motherboard.

Disconnect it carefully using a plastic pry tool.

This prevents accidental power flow during repair.

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Step 6 — Remove Main Flex Cable

Disconnect the main flex cable connected between the boards.

Carefully remove it from the device body.

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Step 7 — Remove the Old Battery

Apply gentle heat underneath the battery using a heat gun or heating pad to soften adhesive glue.

Once warm:

• Insert a plastic pry tool underneath.
• Slowly separate adhesive from the frame.

Avoid bending or puncturing the battery.

Remove the faulty battery completely.

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Step 8 — Install the New Battery

Place adhesive inside the battery compartment.

Install the new battery properly aligned inside the frame.

Press gently to secure it.

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Step 9 — Reconnect Components

Reconnect:

• Main flex cable from both ends.
• Battery connector securely.

Ensure all connectors snap firmly into place.

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Step 10 — Reinstall Midframe

Position the midframe back into the body.

Ensure all clips lock properly before tightening screws.

Secure all 14 screws.

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Step 11 — Seal the Back Cover

Check adhesive condition on the back cover.

If glue is weak:

• Apply B7000 adhesive, or
• Install new double-sided adhesive tape.

Carefully align and press the back cover into position.

Use bonding clips or rubber bands to hold pressure while adhesive cures.

Leave secured for some time.

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Frequently Asked Questions (FAQ)

Q1. How long does Samsung Galaxy A70 battery replacement take?

Typically, the repair takes around 35 to 50 minutes depending on experience level and adhesive removal difficulty.

Q2. Can I replace the battery without heating?

Heating is strongly recommended because strong adhesive holds the back cover and battery. Without heating, parts may crack or bend.

Q3. Is battery replacement safe at home?

Yes, if proper tools and plastic pry tools are used carefully. Avoid metal tools near the battery.

Q4. Why is my phone still draining fast after battery replacement?

Battery calibration may be required. Fully charge to 100% and discharge once completely.

Q5. Do I need glue for the back cover?

Yes. Proper adhesive helps maintain water and dust protection.

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Troubleshooting After Battery Replacement

Q1. Phone not turning on after repair?

Check battery connector and main flex cable connections. Ensure connectors are fully seated.

Q2. Phone not charging?

Inspect charging flex cable alignment and reconnect battery plug again.

Q3. Back cover not sticking properly?

Clean old adhesive residue and apply new adhesive or B7000 glue evenly.

Q4. Device overheating after repair?

Check battery quality and ensure no cables are trapped under the battery.

Q5. Screen or fingerprint not working?

Reopen and inspect flex cables that may have loosened during reassembly.

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