Xiaomi Redmi 4X
In this article, you will find a step-by-step video instruction, a list of tools you need, and key nuances that even experienced craftsmen miss: how to avoid typical mistakes (such as damage to the plume or disconnection of contacts), which batteries are suitable for the Redmi 4X, and how much it costs to replace a professional service center.
If you've never taken a smartphone apart, don't worry. The Redmi 4X is structurally simpler than many modern models: there are no glue joints "deadly", and the body is disassembled without special equipment.
Signs that the Redmi 4X battery is time to change
A rapid drop in charge does not always mean that the battery is out of order, and sometimes the problem lies in background processes, a faulty charger, or even a damaged USB-C connector. However, there are 5 unequivocal symptoms that indicate a “dying” battery:
- 🔋 The smartphone is turned off when 20-30% charge and only activated after connection to charging.
- ⚡ The battery is discharged for 2-3 with minimal load (for example, in standby mode).
- 🔥 The body is noticeably heated in the battery area (especially when charging).
- 📉 In settings (Settings) → Battery → Battery condition) capacity shows less than 70% of the original (original capacity Redmi) 4X — 4100 mAh).
- 🔌 Charging is jerky: it quickly gains interest, then “hangs” at the same level.
If you know at least 2-3 items from the list, you should consider replacing them, and you can check the status of the battery using applications like AccuBattery (available on Google Play), which will show real wear and tear in percentages and current capacity.
⚠️ Attention: If the Redmi body 4X bloated (see the "opened" back cover or the screen begins to move away from the frame) - immediately turn off the smartphone and do not try to charge it.
What tools will be needed to replace
To replace the battery on Redmi 4X, you do not need to buy expensive equipment. A minimum set that will cost 300-500 rubles is enough (or you already have at home):
- 🔧 Plastic blades (2-3 (a) - for the careful smearing of the hull and the disconnection of the plumes.
- 🔨 Cross screwdriver (size) PH00 or PH0) — screw-off.
- 🧲 Magnetic mat or container – to avoid losing small details.
- 🔥 Hair dryer or thermo-air station (optional) - if the glue is too strong.
- 🩹 Alcohol wipes - for cleaning contacts.
- 🔋 New battery – original or quality analogue (more on this below).
Important: do not use metal blades - they can damage the board or screen. Also avoid too powerful hair dryers (maximum 300 ° C at a distance of 10-15 cm) to not melt the plastic.
I turned off my smartphone and pulled it out. SIM-map|Prepared the workplace (clean surface, good lighting)|Checking the new battery for compatibility|I took pictures of the location of the plumes (in case of an error)|Charged the new battery before 30-50% (unless it's in the factory packaging)-->
What battery to choose for Redmi 4X: original vs analogues
The original battery for Xiaomi Redmi 4X is marked BM47 and a capacity of 4100 mAh. However, after 2020, Xiaomi officially stopped supplying spare parts for this model, so only analogues remained on the market.
| Type of battery | Advantages | Deficiencies | Price (2026) |
|---|---|---|---|
| Original (b/u) | Guaranteed compatibility, long service life | Hard to find, risk of buying a 'killed' battery | 800–1500 ₽ |
| Quality analogue (e.g. ZOP Power, Baseus) | New, often with increased capacity (up to 4500 mAh) | may not meet the stated characteristics | 600–1200 ₽ |
| Budgetary analogue (no-name) | Low price, fast delivery | Risk of bloating, small resource (6-12 months) | 300–600 ₽ |
Selection recommendations:
- Check the dimensions - the battery should fit perfectly into the socket (original dimensions: 68 × 65 × 3,85 mm).
- Pay attention to the contacts – they must match the original (4 units: +, –, BSI, NTC).
Where to buy? Best options:
- 🏬 Official Xiaomi distributors (e.g. Mi Store, but the originals are small).
⚠️ Note: If you buy a battery on AliExpress, pay attention to the date of production (indicated on the label) and the battery over 6 months loses up to 20% of its capacity before first use!
Step-by-step: how to change the battery on Redmi 4X
Now, the most important thing is to disassemble the smartphone and replace the battery, and it takes 30-40 minutes if you're careful, and you'll find the video instructions at the end of the section, and below you'll find the detailed text guide.
Video instructions for battery replacement
Step 1. Turn off your smartphone and remove the back cover
- Turn off Redmi. 4X and get the tray for SIM-map.
- Heat the back cover around the perimeter with a hair dryer (1-2 minutes) and this will soften the glue.
- Insert a plastic blade into the gap between the body and the screen (start at the bottom corner) and gently tuck the cover.
Step 2. Unscrew the screws and unplug the plumes.
- Unscrew 10 screws with a cross screwdriver (8 around the perimeter and 2 under the battery).
- Carefully disconnect the battery plume (it is glued to the motherboard).
- Turn off the camera plumes and fingerprint scanner (if they interfere).
Step 3: Remove the old battery
- Put a plastic shoulder blade on the battery, and if it's glued, pull carefully on the ears (white ribbons).
- Don't put too much effort into it! If the battery doesn't respond, warm it up again with a hair dryer.
Step 4: Install a new battery
- Check the contacts of the new battery and clean them with alcohol.
- Stick the battery to double-sided tape (comes with) or use the original glue.
- Connect the battery plume to the board.
Step 5: Build a smartphone
- Connect all the plumes in reverse order.
- Turn the screws (do not pull!).
- Stick the back cover (use a B-7000 glue or similar).
(1) Whether the battery plume is properly connected.
2) Are the contacts closed (call the multimeter).
3) Is the new battery charged (sometimes discharged).-->
Common Mistakes and How to Avoid Them
Even experienced users sometimes make mistakes when replacing the battery. TOP-5 Problems and ways to prevent them:
- 🔧 Screen plume damage occurs when you push too hard with a blade. Solution: use only plastic tools and pull the lid with minimal force.
- 🔥 Overheating board - if you heat a hair dryer longer than 2 minutes Solution: Keep the hair dryer at a distance of 15 cm and use the minimum temperature.
- 📵 The smartphone doesn't turn on after assembly -- usually because the plume is not connected or the battery is dead. Solution: check all connections and charge the battery with an external device.
- 🔋 The new battery is quickly discharged — to blame poor quality analogue or incorrect calibration. Solution: buy batteries with a guarantee and do it. 2-3 full-cycle.
- 🛠️ The extra screws left after assembly are a classic mistake. Solution: photograph the location of the screws before disassembling or use a magnetic mat.
If you damage a plume or board, don't panic. In most cases, it can be repaired with a soldering iron or replaced with a part (screen plume for Redmi). 4X worth ~500 ₽). But if you are not sure of their abilities - it is better to contact the service.
💡
The most common mistake is to turn off the battery plume incorrectly, and if you tear it off with meat, the power controller can damage and the smartphone will stop charging at all. Always pull the plume on the side, not pull it up!
How much does it cost to replace the battery in the service
If you do not want to take risks and prefer to entrust a replacement to professionals, here are the current prices for 2026 (for Moscow and the regions):
| Type of service | Cost (with spare parts) | Time limit for implementation | Guarantee |
|---|---|---|---|
| Official Xiaomi service | 1800–2500 ₽ | 1-3 days | 6 months |
| Informal service | 1000–1500 ₽ | 1-2 hours | 1-3 months |
| Private Master (Avito, Yula) | 600–1200 ₽ | 1 hour | No, 1 week. |
What the price includes:
- 🔧 Battery cost (usually the service takes a markup of 200-300) ₽).
Tip: Before you go to the service, check the reviews and ask them what battery they're installing. Some workshops save and put in cheap no-name batteries that fail in six months.
What to do after replacing the battery
Installing a new battery is only half the battle, and in order for it to last, you have to calibrate it properly and operate it.
- ⚡ Avoid extreme temperatures: Do not leave Redmi 4X in the sun or in the cold (optimally: 10-35)°C).
It's also useful to calibrate the charge rate in the system.
- Charge your smartphone to 100% and don’t turn off charging for another 1 hour.
- Turn off the charging and use the phone until it is completely discharged (until it turns off).
- Charge again to 100% without interruption.
This procedure will reset the controller errors and show the actual battery capacity.
💡
If after replacing the battery, the smartphone began to discharge faster, check the background processes in the settings (Settings → Battery → Battery Use). Sometimes after disassembly, applications that were previously “dormant” wake up.