Complete guide to change the battery of a Xiaomi mobile step by step

When this happened, years ago, changing the battery of our Xiaomi mobile was as simple as removing the back cover, removing the old one, inserting the new one, and turning the smartphone back on. However, with the imposition of ‘unibody’ terminals on the market, accessing the interior of modern phones to replace this component is somewhat more complicated.

Therefore, in this guide to fix your Chinese smartphone you will find all the steps and tools necessary to open your phone and proceed to change the battery.

Do I lose the guarantee?

Xiaomi’s warranty conditions make it clear that ‘ Except as otherwise provided by applicable law, the warranty lasts for two (2) years for the main unit, two (2) years for the originally packaged battery and charger with the product ‘ .

For this reason, if your smartphone is already two years old, you can carry out any repair on it without any problem. However, if this is not the case, it is best that you contact the company so that its technical service can fix the problem with the mobile battery .

Everything you need

To change the battery of your Xiaomi mobile and any other phone you are going to have to use a series of tools that, luckily, are not very expensive. For 10 euros you can find screwdriver kits, double-sided tape, levers, adhesives, suction cups and everything you need to achieve your goal.

In addition to the tools, and after knowing that this component is the source of the problem with your Xiaomi, before opening the Chinese mobile, it is normal that we go on to buy a replacement battery to change it with the old one.

Amazon has a good catalog of spare parts for mobile phones of the brand and from the previous link you can find the one you need, simply by choosing the model you want to repair.

Replace the battery, step by step

In general, all Xiaomi models with Unibody design follow a similar process to disassemble their screen, access the interior of the phone and be able to extract this internal element to connect a new one. Of course, we must carefully follow all the steps that we will tell you below so that you do not damage any other component of the Chinese device.

However, there are a number of exceptions. There are some older models such as the Mi A family, which will require an extra step when changing the battery. If you see that your mobile has some screws around the charging port, before starting the process you must remove them to be able to detach the screen from the frame.

After knowing this detail, it is time to change the battery of the Xiaomi, Redmi or POCO mobile step by step:

1. Turn off the phone.
2. Remove the SIM and MicroSD card.
3. Apply heat to the back of the phone with a hair dryer.
4. Place a suction cup on the bottom of the phone’s back cover and lift towards you to create a tiny gap between the body and the glass.
5. Insert an opening pick into the space created.
   
6. Slide the pick to the bottom right corner.
7. Repeat the previous two steps but now move the second pick to the lower left area.
8. Now we must slide a third prong along the phone to peel off the adhesive. You can use all the spikes you need until you manage to separate the screen from the body, always without exceeding 5mm of insertion into the device.
9. Pull the suction cup to one side of the phone and rest the back panel against the smartphone.
10. Take the Sprudger (tool that you can see in the photo) and disconnect the cable that goes to the fingerprint reader, if it has one.
    
11. Remove all the screws that you locate on the back. (This point may vary between models and the screws may be less or more in number).
12. Use an opening pick to cut through the adhesive under the black protective mat that covers the top speaker assembly (there is a small piece of protective copper foil under the NFC and charging coil assembly, and be careful not to damage it).
13. Once removed, insert a pick to remove the phone’s motherboard cover, if it was on top of the phone.
14. Remove the black foil that covers this terminal component.
15. Again use a spudger (suction cup) to pry up and disconnect the flex cable from this internal component of the phone.
16. Repeat the previous step with all the cables that go to this component, always using the sprudger or spikes.
17. If there is any element that prevents lifting the battery (such as the speaker), you must unscrew it.
18. Unfold the battery tabs with the help of tweezers.
    
19. Reapply heat to the battery area to plumb down any adhesive we may find on the component.
20. Pull the removed tabs towards you with the help of tweezers very carefully. Also, check if there is any connection between the battery and the device that we have not removed. It can help you with the suction cup that we have used to remove the back of the Xiaomi mobile.
21. Completely remove it from the smartphone.

Now, to place the new cell in your phone, you will have to repeat this process but in reverse. For this reason, it is recommended that you write down or remember where each cable, connection and where each screw is inserted. We personally recommend that you do not leave it to memory, but take a pen and paper to write down where everything that you have just removed from the terminal goes.

Also, before putting new adhesive and mounting the mobile, it is important to remove any remaining adhesive from the phone and clean the glued areas well with isopropyl alcohol and a lint-free cloth.

Finally, the moment of truth arrives. Please test the smartphone and its operation before installing the new adhesive and reseal the phone. In this way, if it does not turn on, we can check if we have connected everything correctly, and thus we will save ourselves having to open it a second time.

Cautions and tips

You already know each of the steps that we must follow if we want to get into the adventure of replacing this component of our Chinese mobile. However, we will also leave you with a series of tips that you should take into account when you go to get down to work, especially if you have never dared to open any similar device:

• We recommend photographing the mobile before taking each step so that you can know 100% where each element was connected.
• Never pull or force a cable, following the indicated steps you should remove it without difficulty.
• When you use a heat source, do it for short periods of time and check that it is not too high.
• Do your best not to deform it during the extraction process. These elements are composed of soft-shell lithium ions. Because of this, they can leak dangerous chemicals, catch fire, or even explode if damaged. Do not use excessive force or poke into the battery with metal tools.
• Do not reinstall a damaged or deformed one, as doing so is a potential hazard to the phone’s integrity.
• If you have any doubts throughout the process, it is best that you take the mobile to be repaired before damaging it completely.

However, if we are not able to do it on our own, or we have no idea what the ideal battery for the phone is, don’t worry. We only have to contact a specialized technical service. It may be both the brand official and a store in our area that is responsible for the replacement of this component of the smartphone.