OnePlus 9 5G Battery Replacement

Written By: Dominik Schnabelrauch

Comments: 5

Difficulty

Moderate

Steps

Time Required

45 minutes - 1 hour

Introduction

Use this guide to replace the battery in your OnePlus 9 5G.

For your safety, discharge the battery below 25% before disassembling your phone. This reduces the risk of fire if the battery is accidentally damaged during the repair. If your battery is swollen, take appropriate precautions.

It isn't mandatory to remove the daughterboard cover and the interconnect cable in order to replace the battery. However, doing so reduces the risk of damaging surrounding components. If you're experienced in repairs and decide not to do so, deal with the interconnect cable like with the charging port cable in step 25 of this guide.

You'll need replacement adhesive for the battery and the rear glass in order to complete this repair.

Note: Retaining water resistance after the repair depends on how clean the mating surfaces are and how accurately the adhesive is reapplied. Your device will lose its factory-given IP (Ingress Protection) rating, however, only the T-Mobile versions of the OnePlus 9 5G offer an IP rating.

Tools

Parts

Step 1

Completely power off your phone before you begin.
Prepare an iOpener and apply it to the rear glass for at least three minutes to loosen the adhesive underneath.
A hair dryer, heat gun, or hot plate may also be used, but be careful not to overheat the phone—the display and internal battery are both susceptible to heat damage.

Step 2

Apply a suction handle to the rear glass, as close to the bottom edge as possible.
If your rear glass is badly cracked, covering it with a layer of clear packing tape may allow the suction handle to adhere. Alternatively, very strong tape may be used instead of the suction handle. If all else fails, you can superglue the suction handle to the broken rear glass.
Pull up on the suction handle with strong, steady force to create a gap between the glass and the frame.
If you have trouble creating a gap, apply more heat to further soften the adhesive.
Insert an opening pick into the gap.

Step 3

Slide the opening pick to the bottom right corner to slice the adhesive.
Leave the opening pick in place to prevent the adhesive from resealing.

Step 4

Insert a second opening pick underneath the bottom edge of the rear glass.
Slide the opening pick to the bottom left corner to slice the adhesive.
Leave the opening picks in place to prevent the adhesive from resealing.

Step 5

If the adhesive becomes hard to cut, it has most likely cooled down. Use your iOpener to reheat it.
Insert a third opening pick underneath the bottom left corner of the rear glass.
Slide the opening pick along the left edge of your phone to slice the adhesive.
Leave the opening pick in the top left corner to prevent the adhesive from resealing.

Step 6

Insert a fourth opening pick underneath the top left corner of the rear glass.
Slide the opening pick along the top edge to slice the adhesive.
Leave the opening pick in the top right corner to prevent the adhesive from resealing.

Step 7

Insert a fifth and final opening pick underneath the top right corner of the rear glass.
Slide the opening pick along the right edge of the back cover to slice the remaining adhesive.

Step 8

Remove the rear glass.
If the rear glass is still stuck to the frame, slide an opening pick around the entire perimeter until the rear glass separates completely.
During reassembly secure the rear glass with pre-cut adhesive or double-sided adhesive tape. After installing the rear glass, apply strong, steady pressure to your phone for several minutes to help the adhesive form a good bond—a stack of heavy books works well.

Step 9

Use a pair of tweezers to carefully peel the bottom right corner of the charging coil tape off of the daughterboard cover.

Step 10

Use a pair of tweezers to carefully peel the bottom left corner of the charging coil tape off of the loudspeaker.

Step 11

The flash assembly is held in place by mild adhesive and covers a motherboard cover screw.
Carefully slide an opening pick underneath the bottom edge of the flash assembly.
Use your opening pick to pry up the flash assembly.
Don't try to remove the flash assembly all the way during this procedure. Its cable is adhered to the backside of the motherboard cover.

Step 12

Use a Phillips screwdriver to remove the ten 3.8 mm-long screws securing the motherboard cover.
One of the motherboard cover screws is covered by a white water ingress sticker. To unfasten the screw you can puncture the sticker with your screwdriver.

Step 13

The motherboard cover is further held in place by tight plastic clips.
Insert a spudger underneath the bottom right edge of the motherboard cover.
Pry upwards to loosen the motherboard cover and create a gap.

Step 14

Insert an opening pick underneath the bottom right edge of the motherboard cover.
Slide the opening pick up along the right edge of the motherboard cover.
Twist the opening pick to release the plastic clips and pry up the motherboard cover.

Step 15

Use a pair of tweezers or your fingers to remove the motherboard cover.
The charging coil is attached to the motherboard cover and will lift up at the same time.

Step 16

Use a spudger to disconnect the battery cable by prying the connector straight up from its socket on the bottom left corner of the motherboard.
To re-attach press connectors like this one, carefully align and press down on one side until it clicks into place, then repeat on the other side. Do not press down on the middle. If the connector is misaligned, the pins can bend and cause permanent damage.

Step 17

Use a Phillips screwdriver to remove the five 3.8 mm-long screws securing the daugtherboard cover.
One of the daughterboard cover screws is covered by a white water ingress sticker. To unfasten the screw you can puncture the sticker with your screwdriver.

Step 18

Insert the point of a spudger underneath the top right edge of the daughterboard cover.
Pry upwards to loosen the daughterboard cover.

Step 19

Use a pair of tweezers or your fingers to remove the daughterboard cover.

Step 20

Use a spudger to disconnect the interconnect cable from the motherboard by prying the connector straight up from its socket.

Step 21

Slide one arm of a pair of tweezers underneath the metal bracket covering the interconnect cable.
Use your tweezers to lift and unhinge the metal bracket.
Remove the metal bracket.

Step 22

Use a spudger to disconnect the interconnect cable from the daughterboard by prying the connector straight up from its socket.

Step 23

Use a pair of tweezers or your fingers to remove the interconnect cable.

Step 24

Use a spudger to disconnect the charging port cable by prying the connector straight up from its socket on the bottom edge of the motherboard.

Step 25

Don't fold the cable sharply during this step to avoid damaging it.
Fold the charging port cable towards the bottom of the phone to access to the battery.
You might want to use a small piece of tape to temporarily stick the cable onto your working surface to avoid accidentally damaging it during the battery removal.

Step 26

Take care not to puncture or bend the battery with your tool—a punctured or bent battery may leak dangerous chemicals or cause a fire.
Use a pair of blunt nose tweezers to peel the right pull tab off of the battery until you can grip it with your fingers.

Step 27

Don't try to remove the battery all the way yet. The left side is still adhered to the midframe.
Grab and lift the right pull tab to remove the right side of the battery from its recess.
If you're having trouble lifting the battery out of its recess, apply a heated iOpener to the screen side for two minutes to loosen the battery adhesive.
A hair dryer, heat gun, or hot plate may also be used, but be careful not to overheat the device.
Only apply heat to the screen side to prevent the battery from overheating.

Step 28

Use a pair of blunt nose tweezers to peel the left pull tab off of the battery until you can grip it with your fingers.

Step 29

Grab and lift the left pull tab to remove the left side of the battery from its recess.

Step 30

Take care not to bend the battery during the removal procedure—a bent battery may leak dangerous chemicals or cause a fire.
Lift the battery from any remaining adhesive and remove it.
Don't reinstall a damaged or deformed battery, as doing so is a potential safety hazard.
During reassembly, temporarily reconnect the battery to the motherboard before you press it into place to ensure correct alignment. Disconnect the battery after it's seated.
Secure the new battery with pre-cut adhesive or double-sided adhesive tape. In order to position it correctly, apply the new adhesive into the device at the places where the old adhesive was located, not directly onto the battery. Press the new battery firmly into place.

The battery which you have in your list at the top of this guide, states it is a BLP829, this is incorrect. The correct battery number is a BLP821 or as seen in the pic above as an XA-P821-115, this I found out after following your guide & having the BLP829 ready to go in as a replacement.

The BLP829 connect's to the phone by a connector on the right, when trying to fit, but the BLP821 actually has it on the left hand side....this is when the battery has its connection point face down, & ready to be refitted.

So I think you need to correct your battery number in the list above, or there will be people like myself, who end up buying a battery that is not meant for the UK spec OnePlus 9, or at least warn people to, check which battery they need before purchasing, so they don't order the wrong battery & then have to wait for the correct to be delivered.

Dash -

Conclusion

To reassemble your device, follow these instructions in reverse order.

During reassembly, apply new adhesive where it's necessary after cleaning the relevant areas with isopropyl alcohol (>90%).

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 OnePlus 9 5G answers community for help.

Author

Dominik Schnabelrauch

Member since: 23/11/16

201162 Reputation

4 comments

The produce you sale, OnePlus 9 5G Battery - BLP829, have the cable upside down. It's shown on your picture. The smooth side show face up, but it faces down. There is no way to install it! I'm looking to return the battery.

Jijun Wang -

I had the same issue, and additionally, the BPL829 is a few mm to tall to fit in the LE2115, even though the description says it is compatible. I got to the point I was ready to put the new battery in, and noticed the connector was facing the wrong way. I tried to fit it in anyway to see if I could make it work, and the new battery won't even fit in the slot. Very disappointed.

Nathan Petersen -

I had this same problem and asked about it in the forum. Top suggestion was to use the Oppo BLP821. I ordered one off the least-sketchy looking ebay seller for it, and it fits and functions perfectly. I am guessing the reason the T-Mobile variant is different, is because it's IP rated.

Zed -

Just installed mine with the Oppo BLP821 battery - the cable was maybe 2mm further across than the OEM battery but there was enough slack in the cable to move it.

Just FYI, I did not need to remove the daughterboard or cables - the two cables which run over the battery could easily be bent out of the way. This simplifies the process and makes it significantly quicker.

Damian Connolly -