The legendary 2017 flagship Xiaomi Mi6 still delights many users with its performance and compact case of glass and metal. However, time is inexorable: lithium-polymer power supplies degrade, losing capacity after hundreds of charging cycles. If your smartphone began to quickly discharge, turn off in the cold or show the wrong percentage of charge, it’s time to think about replacing the battery.
The replacement procedure in this model has its own peculiarities due to the design without frames and the glass back cover, which is attached to the glue. Unlike budget models with a plastic cover, it will require accuracy, heating and special tools. Self-repair will save a significant amount and extend the life of your favorite gadget for another couple of years.
Before starting disassembly, you need to make sure that the problem lies in the wear of the chemical battery, and not in the software failure or malfunction of the charge controller.The nominal capacity of the original Xiaomi Mi6 battery is 3350 mAh, and if the real capacity fell below 70-80% of this value, replacing is the only effective solution.
Tools and workplace preparation required
A good battery replacement is impossible without the right tools. Since the Xiaomi Mi6 has a glass back, the risk of breaking it if you open it in a careless way is very high. You will need a dryer (construction or household with a narrow nozzle) to soften the adhesive, as well as a set of plastic mediators or old bank cards.
To work with the internal components, you will need small cross screwdrivers (usually the size of PH00 or PH000), tweezers with curved ends and a suction cup. Be sure to prepare the B-7000 or E-8000 adhesive for subsequent sealing of the case, as the factory adhesive tape loses its properties after opening.
- 🔧 Dryer or thermoplatform to heat the back cover
- 📱 Plastic shoulder blades and suction cup for opening
- 🔋 New battery with a connector for Xiaomi Mi6
- 🧴 Clay. B-7000/E-8000 and toothpick
Organize the workplace so that all the parts are at hand, and the surface is clean and well lit. Small screws are better folded in a magnetic tray or spread out on a sheet of paper with notes, so as not to confuse them during assembly, as the smartphone can use screws of different lengths.
⚠️ Warning: Before starting any work, be sure to turn off the device. Attempting to disassemble the phone on can lead to a short circuit and the motherboard fails.
Make sure you have enough time and no one will distract you in the process. Haste is the main enemy when dealing with plumes and brittle glass. If you're doing it for the first time, set aside about 40-60 minutes for the procedure.
Rear cover removal and protection process
The first step is to carefully separate the back glass panel, and the glue that holds it is very strong, so you can't try to uncook the lid without preheating, turn on the hair dryer and evenly warm the perimeter of the device for 2-3 minutes, holding the nozzle at a distance of 3-5 cm.
Once heated, apply the suction cup to the bottom of the back cover and pull up slightly to create a gap. Insert a plastic mediator into the resulting gap and begin to guide it carefully along the faces, gradually cutting through the adhesive layer. The movements should be sliding, not stabbing, so as not to damage the glass or frame.
When the lid is separated, you'll see a metal plate covering the main board and the battery, which is also mounted on screws and possibly adhesive-based, unscrew all the visible screws around the perimeter of the plate, and be careful: some screws may be hidden under decorative plugs or stickers.
- 🌡️ Heat the edges evenly without holding the hair dryer at one point
- 🔪 Use a thin mediator to cut glue
- 🔩 Fold the screws in order of their removal.
When you remove the metal shield, you get access to the insides of the Xiaomi Mi6. Pay attention to the location of the plumes: they can be glued to a frame or battery. Act slowly, evaluating each movement.
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If the glue on the back cover does not soften, try to warm it up a little more, but watch the temperature of the case so as not to overheat the screen matrix, which is also sensitive to heat.
Disconnecting plumes and removing the old battery
The most critical thing is to cut the power, find the battery connector on the motherboard, which is usually located at the top, next to the other plumes of the display, and carefully tuck the connector with a plastic blade or nail, trying not to damage the connector and contacts.
⚠️ Warning: Never pull the wires of the plume. You only need to turn off the connectors by the hard part of the connector, shaking it from side to side.
Once the battery is turned off, you can safely disconnect the remaining plumes if they interfere with battery recovery. In the Xiaomi Mi6, the battery is also planted on glue, but often it is held by a metal frame or plastic tongues. Check for additional screws that lock the battery itself or press plates.
If the battery is glued to the body, use a hair dryer again to warm up the bottom of the smartphone, slap the edge of the battery with a mediator and gradually injected it deeper, separate the glue, you can use a special hood or suction cups if they cling to something, but most often helps with a careful mechanical action.
When removing an old cell, monitor its condition. A ballooning battery is a sign of serious wear and potential danger. Handle it carefully, without damaging the shell, and immediately dispose of it in a special container.
☑️ Check before installing a new battery
Installation of a new battery and assembly
Before installing a new battery, you need to thoroughly clean the seat of the old glue residue. Use an alcohol-containing liquid and a plastic card. The surface should be smooth and clean so that the new battery will lie flat and tight.
Apply a thin layer of B-7000 glue to the frame of a new battery (if it doesn't have a factory-made adhesive base) or to the body of your smartphone. Put the battery in the case, making sure the connector matches the contacts on the board. Don't glue the battery to the battery dead immediately - you first need to check the health.
Connect the battery plume to the characteristic click. Make sure it's in smoothly and tightly. Now you can temporarily turn on the smartphone by pressing the power button. If the device responds, shows charging and the correct percentage, then the installation was successful.
| Parameter | Original | Quality copy | Cheap analogue |
|---|---|---|---|
| Capacity | 3350mAh | 3200-3300 mAh | 2000-2500 mAh |
| Cycle resource | 500+ cycles | 300-400 cycles | 100-150 cycles |
| Stability | Tall. | Medium | Low. |
| Price. | Tall. | Medium | Low. |
After successful testing, apply the glue around the perimeter of the back cover and press it tightly against the body. For better fixation, you can use rubber stationery gums, tying them around the phone for 1-2 hours until the glue is completely dry.
What if the phone doesn’t turn on after replacement?
Calibration and primary charging
After installing a new battery, the system may not display the charge level correctly. This is normal, since the power controller has not yet "understood" that the capacity has been updated. To calibrate, it is recommended to completely discharge the smartphone before turning off, and then charge it to 100% when turned off.
The calibration process helps the electronics redefinition of the capacitance boundaries. Repeat the cycle full discharge - full charge 2-3 times, which will allow the system to accurately calculate the remaining operating time and percentage of charge.
In the early days of use, watch the device heat up. The new battery may warm up a little when charging actively, but it should not be so hot that it cannot be held in your hands. If the heating is excessive, stop using immediately and check the connection.
- 🔋 Lower the phone to 0% (auto output)
- 🔌 Charge to 100% in the off state
- 🔄 Repeat the cycle 2-3 time-in-time
Do not use quick charges of questionable quality in the first cycles. It is better to charge the Xiaomi Mi6 with a standard power supply or a certified analogue with a current of 1-2 Ampere.
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Proper calibration in the first days of operation extends the life of the new battery and ensures the accuracy of the charge display.
Frequent errors and precautions
One of the most common mistakes is using metal tools to turn off the plumes. The metal conducts current and can close contacts on the board, which will cause the controller to burn. Always use dielectric materials, plastic or wood.
Another mistake is ignoring the heat when disassembling: trying to remove the lid "cold" in 90% of cases ends in cracked glass. The glass in the Xiaomi Mi6 is thin and fragile, it requires patience and warmth.
⚠️ Warning: Do not puncture or bend the battery; damage to the internal structure of the lithium polymer battery may cause a fire or chemical reaction.
Users also often forget to clean the contacts, oxidation or dust on the connector can cause poor contact, voltage surges and unstable operation, and wipe the contacts with alcohol before final assembly.
If you feel insecure at any stage, it is better to stop. Electronics repair requires composure. In case of doubt, contact the professionals to avoid aggravating the breakdown.