Now Reading: OnePlus 8T Battery Replacement Guide | DIY Repair
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OnePlus 8T Battery Replacement Guide | DIY Repair
Replacing the battery on your OnePlus 8T is one of the most effective ways to restore battery life, fix random shutdowns, or solve fast-draining issues. If your phone no longer lasts a full day, overheats while charging, or shows battery health warnings, a new battery can make it feel like new again.
In this detailed DIY guide, we’ll walk you through the complete OnePlus 8T battery replacement process, including safe disassembly, internal component removal, and proper reassembly. This guide is suitable for users with moderate repair experience and proper tools.
Repair Overview
Device Type: Smartphone
Repair Type: Internal Battery Replacement
Battery Model: BLP801
Repair Difficulty : ★★★★★☆☆☆☆☆ (5/10 – Moderate)
Estimated Time: 45–75 minutes
Reasons for OnePlus 8T Battery Replacement
- Battery draining quickly
- Phone shutting down at 20–30%
- Swollen or bulging battery
- Overheating during charging
- Phone not powering on
- Charging stuck at a certain percentage
- Reduced screen-on time
If you’re experiencing any of these issues, replacing the battery is often the most cost-effective solution.
Before You Begin
Compatibility and Model Numbers
- Oneplus 8T
- Oneplus 8T+ 5G
This repair guide based on OnePlus 8T
Model Numbers | KB2001, KB2000, KB2003, KB2005, KB2007
Tools Required
- Mobile phone heating pad or hairdryer/heat gun
- Plastic pry tool / card pry
- Suction cups
- Phillips #00/#000 screwdrivers
- Torx T3 / T4 Screwdriver
- Flathead Screwdriver
- 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/3IgZ75c
- Screen – https://amzn.to/46iYhNy
- Other Parts – https://amzn.to/47Hh2N3
- Silicone Work Repair Mat https://amzn.to/45Emz5l
Protect Your Oneplus 8T
Protector For The Screen https://amzn.to/4nXZi55
Best Rated Case https://amzn.to/46acCf2
Step-by-Step OnePlus 8T Battery Replacement
Step 1: Power Off and Remove SIM Tray
Turn off your phone completely.
Remove the SIM tray using a SIM eject tool before starting the disassembly.
Step 2: Heat and Remove the Back Cover
The OnePlus 8T back cover is secured with strong adhesive.
- Heat around the edges of the rear cover using a heating pad (mobile heating option), heat gun, or hair dryer.
- Apply heat evenly to soften the adhesive.
- Use a suction cup to create a small gap between the frame and back cover.
- Insert a plastic card or pry tool and carefully cut through the adhesive around all edges.
⚠️ Be patient and avoid inserting tools too deep to prevent internal damage.
Once loose, lift off the back cover.
Step 3: Remove the Mainboard Frame
- Remove the shield.
- Disconnect the flash connector plug.
- Unscrew nine screws securing the mainboard frame.
- Use a pry tool to carefully lift and remove the frame.
Step 4: Disconnect the Battery
Locate the battery connector on the left-hand side and disconnect it before continuing.
⚠️ Always disconnect the battery first to prevent short circuits.
Step 5: Remove Bottom PCB Cover
- Move to the bottom section.
- Remove seven screws securing the PCB protective cover.
- Lift and remove the cover.
Step 6: Remove Main Flex Cable
Disconnect the main flex cable from both the top and bottom connectors.
Step 7: Remove Secondary PCB
- Remove the securing screw.
- Disconnect both antenna cables.
- Disconnect two connector plugs.
- Carefully pry out the secondary PCB board.
Step 8: Remove Charging Port Flex
- Disconnect the charging port flex cable.
- Remove two screws securing it.
- Lift and remove the flex cable.
Step 9: Remove the Battery
The OnePlus 8T battery appears as two separate cells, but it uses a single connector.
- Loosen the adhesive strips on both sides.
- Pull the red adhesive tabs gently and steadily.
- Carefully lift the battery out of the frame.
⚠️ Do not bend or puncture the battery.
Step 10: Install the New Battery
- Place the new battery properly into position.
- Apply fresh adhesive if necessary.
- Press gently to secure it.
Step 11: Reassemble the Phone
Follow these steps in reverse order:
- Reinstall charging port flex and secure with two screws.
- Install secondary PCB and secure with screw.
- Reconnect antennas and plugs.
- Install main flex cable and connect both ends.
- Replace PCB cover and secure with seven screws.
- Reconnect battery connector.
- Install mainboard frame and secure with nine screws.
- Reconnect flash sensor and replace shield.
Step 12: Seal the Back Cover
Before sealing:
- Ensure sufficient adhesive is applied.
- Use B7000 glue or a new back cover adhesive if needed.
- Reinsert the SIM tray.
- Press the back cover firmly into place.
- Use bonding clips or rubber bands.
- Leave secured for at least 30–60 minutes.
Frequently Asked Questions (FAQ)
Q1: How do I know if my OnePlus 8T battery needs replacement?
If your phone drains quickly, shuts down randomly, overheats, or doesn’t charge properly, the battery may be degraded.
Q2: Is the OnePlus 8T battery removable?
No, it is internally glued and requires disassembly.
Q3: Can I replace the battery without removing the motherboard?
No, internal components must be removed to safely access the battery.
Q4: Will replacing the battery improve performance?
Yes. A fresh battery can improve stability, reduce overheating, and restore battery life.
Q5: Do I need to recalibrate the new battery?
It’s recommended to charge to 100%, then discharge to 5–10% once for calibration.
Troubleshooting After Battery Replacement
Q1: The phone does not turn on. What should I do?
Check the battery connector, ensure it is properly seated, and connect the charger for 15–20 minutes before trying again.
Q2: Phone is not charging.
Verify the charging port flex is correctly installed and all connectors are secure.
Q3: Back cover not sticking properly.
Use new adhesive or B7000 glue and apply even pressure using clips or rubber bands.
Q4: Signal issues after repair.
Make sure antenna cables are firmly connected to the secondary PCB.
Q5: Fingerprint or flash not working.
Check that the flash/sensor connector was reconnected properly.
Replacing the battery on the OnePlus 8T is a moderate-level repair that can significantly extend your device’s life. With patience, proper tools, and careful handling, you can complete this repair successfully at home.
If you found this guide helpful, feel free to explore more repair tutorials to keep your devices running like new.
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