Xiaomi Redmi 4X is one of the most popular budget smartphones of 2017, but even 7 years after its release, its owners are faced with the need to replace the battery. Removing the battery on this model requires accuracy: improper actions can lead to damage to the plumes, rupture of flexible cables or even short circuit. Unlike modern devices with modular batteries, the Redmi 4X has a glued battery, which complicates the process.
This article will help you understand how to safely remove the battery without damaging the motherboard or display. We will look at the necessary tools, step-by-step instructions with photos, and the typical mistakes that beginners make. If you have never disassembled a smartphone, don’t worry: with the right approach, even without experience, you can cope in 20-30 minutes.
Preparation: tools and security
Before starting the disassembly, make sure you have everything you need, and that you don't have at least one tool that can cause permanent damage, and here's the minimum set.
- 🔧 Plastic mediators or shoulder blades (2-3 pieces) - for separation of the back cover and the battery.
- ⚙️ The screwdriver. PH00 — for the screws of the body (a regular screwdriver will not fit!).
- 🔥 Dryer or thermo-air station - for softening the glue (temperature 60-80)°C).
- 🧲 Magnetic mat or container – so as not to lose screws.
- 🩹 Alcohol wipes - to clean the glue residues.
- 🔋 New battery (if you are planning to replace) – check compatibility with the Redmi model 4X (santoni).
Important: Redmi 4X has a non-removable battery glued to the body. Forced unheating can damage the aluminum back cover or break the battery. If you're not sure about yourself, you should contact the service center.
⚠️ Warning: Do not use metal tools to tamper with the battery! Even a small circuit of the contacts of the battery can cause fire. Plastic mediators are safer.
Step-by-step: how to remove the back cover
The first step is to carefully separate the back panel, and on the Redmi 4X, it's mounted on latches and glue, so you have to be careful.
- Turn off your smartphone and remove the tray for SIM-This will prevent accidental switching on during disassembly.
- Heat the edge of the back cover (around the perimeter) with a hair dryer for 1-2 minutes. The glue will become elastic, and the panels will be easier to separate.
- Insert a plastic mediator into the gap between the body and the cover (start at the bottom edge where the charging connector is located). Carefully drive the tool along the body, separating the latches.
- After the lid is separated by 2-3 mm, put your fingers or a second mediator in it. Don't put too much effort into it, there are plumes inside!
If the lid doesn't respond, reheat the problem areas. On the Redmi 4X, the latches near the power button are the most vulnerable, and they can be easily broken when you move sloppyly.
Is the smartphone off the grid?
Is the tray removed? SIM-map?
Are the edges of the lid heated with a hair dryer?
Are plastic mediators ready?
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Disconnection of plumes and access to the battery
When you take off the back cover, you'll see the motherboard, the camera and the battery, and you'll need to disconnect all the plumes before you touch the battery.
- 📸 Main camera plume - gently attach the black connector with a plastic blade.
- 🔊 Dynamic plume - located next to the charging connector.
- 📱 The display plume is the widest, is fastened by a metal latch (lift it with a screwdriver).
- 🔋 Battery connector - red or orange, usually glued with tape.
Important: Redmi 4X plumes are very fragile. Don't pull them by the wires, just by the plastic connectors! If contact fails, check if there's a latch.
| schleife | Location. | Features of disconnection |
|---|---|---|
| Battery | The top of the board, next to the camera | Sticked with scotch - gently put it on |
| Display. | Board center, under a metal latch | First, lift the latch with a screwdriver. |
| Main camera. | Top left corner | It's a latch, don't pull it up! |
| Dynamician | The bottom edge of the fee | Maybe it's soldered - don't use force. |
⚠️ Attention: If after disabling the display plume, the screen flashed or showed artifacts - this is a sign of damage to the contacts.
Removal of the battery: technology and risks
The Redmi 4X battery is glued to the body with double-sided tape, and you'll need to remove it.
- Heat the battery again with a hair dryer (temperature no higher than 80°C!) for 2-3 minutes. This will soften the glue.
- Fill the battery with a plastic blade from any angle. Don't use metal, you're at risk of short circuit!
- Carefully pull up, if necessary, cutting with a thread or a special string for batteries.
- If the battery fails, reheat the problem area. Don't force it, you can tear the shell.
The Redmi 4X often has a problem: the battery is glued too tightly, and when you try to remove small components from the board, if you notice that parts are raised with the battery, stop and consult a specialist.
What to do if the battery is blown?
After the battery is removed, clean the case of glue residues with alcohol. The new battery must fit tightly to the body - otherwise there may be problems with cooling and fixation.
💡
If you plan to use a smartphone without a battery (for example, to test the board), connect it to charging with a voltage of no higher than 5V. Redmi 4X can work without a battery, but only for a short time - no more than 5-10 minutes to avoid overheating.
Installation of a new battery and assembly
Before installing a new battery, check:
- 🔍 Model compatibility (marking must be indicated) BW B3L14 or similar).
- 📏 Sizes – the new battery should fit perfectly into the groove.
- ⚡ Voltage (standard for Redmi) 4X — 3.8V, 4100 mAh capacity).
Installation process:
- Remove the protective film from the new battery (if any).
- Stick bilateral tape on the case (use original or similar in thickness).
- Carefully install the battery, starting with the connector, and it should lie flat, without distortion.
- Connect the battery plume to the board and fix with tape.
Next, assemble the smartphone in reverse order:
- Connect all the plumes (display, camera, speaker).
- Install the back cover starting at the top edge.
- Turn the screws (do not pull!).
- Put the tray in. SIM-map.
⚠️ Note: After replacing the Redmi battery 4X It can show a faulty charge level in the first 2-3 charge cycles. This is normal — calibration takes time. To speed up the process, completely discharge and charge the smartphone 1-2 times.
Frequent Mistakes and How to Avoid Them
Even experienced craftsmen sometimes make mistakes when disassembling the Redmi 4X.
- 🔥 Battery overheating with a hairdryer - temperature above 80°C can damage the board or melt plastic. Use a thermometer.
- 🔧 Loss of screws at Redmi 4X If you mix them up, you risk damaging the board.
- 📱 Display plume damage – if the screen doesn’t work after assembly, check the contacts with a multimeter.
- 🔋 Use of a non-original battery - cheap analogues can swell in 2-3 months.
If after the battery replacement, the smartphone does not turn on:
- Check the battery plume connection.
- Make sure the charging connector is not contaminated.
- Connect the charger – sometimes an initial charge is required.
1. quality of the new battery (may be defective).
2. the presence of background processes (resetting to factory settings can help).
3. Charging connector state (oxidation of contacts increases energy consumption).-->
Alternative methods: when disassembly is impossible
If you don’t take the risk of disassembling your smartphone yourself, there are a few alternatives:
- 🔧 Referral to the service center – the average cost of replacing the battery with Redmi 4X 2026: 1500-2500 rubles (including work and spare parts).
- 📦 Buying an external battery (powerbank) is a temporary solution if the battery still holds a charge, but quickly goes down.
- ♻️ Recycling and buying a new smartphone – if there are other problems besides the battery (for example, a broken display or communication module).
When choosing a service center, specify:
- Do they use original batteries (or at least quality ones)?
- Do you have a job guarantee (at least 3 months).
- Do you diagnose the board after replacement (sometimes battery malfunctions mask power problems).
If you decide to sell a Redmi 4X with a faulty battery, honestly state this point in the ad.The average price for a used device with a problem battery in 2026: 1000-1500 rubles.