Replacement of the battery on Xiaomi Redmi 4: detailed instructions with photos and videos

Xiaomi Redmi 4 is one of the most popular budget smartphones of 2017, but even after 5-7 years of operation, the battery loses up to 50% of capacity. If your phone runs out in a couple of hours, turns off at 30% charge or overheats during charging, it’s time to think about replacing the battery. In this article, we will discuss how to change the battery on Redmi 4 (including versions of Redmi 4 Pro and Redmi 4X) with your hands without contacting the service center.

Self-replacement will cost 3-5 times less than in the workshop (the price of work there starts from 1500 rubles), but requires care. We will describe in detail each step, from choosing a new battery to assembling the phone, and also warn about the typical errors that can damage the plumes or motherboard. If you have never disassembled smartphones, do not worry: the design of the Redmi 4 is simpler than many modern models.

How to understand that the battery Xiaomi Redmi 4 is time to change: 5 clear signs

Before you start the screwdriver, make sure the battery is the problem.

• 🔋 Phone's running out of power. 2-3 hours with moderate use (social networks, messengers).
• 🔌 Charging jumps: for example, with 40% drops 15%, or the phone is turned off when 20-30% leftover.
• 🔥 The body heats up strongly during charging or playing (especially in the area of the camera).
• ⚡ Battery swelled: the back cover moves away from the body, the screen is "raised" at the edges.
• ⏳ The full charge time has increased to 4-5 hours (with a proper power supply).

If at least 2-3 points match, the battery needs to be replaced. For accurate diagnosis, you can use applications like AccuBattery (showing real capacity) or the built-in engineering test menu: type in the dial # #4636##, select Battery Information and compare the current capacity with the factory (3500-4100 mAh depending on the version of Redmi 4).

⚠️ Warning: If the battery is swollen, don't delay replacement! Lithium-ion batteries can ignite when deformed, especially when heated or mechanically exposed.

What battery to choose for Xiaomi Redmi 4: original vs analogues

The quality of the battery depends on whether it will last 1 year or 5 years.

Xiaomi’s original batteries are labeled MBJ4016 (for Redmi 4 Pro/Prime) or MBJ4017 (for Redmi 4X) from official distributors (for example, the Mi Store) or AliExpress from trusted sellers with a rating above 98%. Among their counterparts, the CAMELION, Remax and Baseus brands are well-established – they often supply batteries with overheat protection and a charge controller.

Avoid batteries that are unmarked, misprinted in the model name or too cheap (below 500 rubles).

• 🔥 Overheat and swell through 2-3 month.
• 📉 Quickly lose capacity (up to 30% in six months).
• 💥 Damage the power controller on the motherboard.

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Before buying, make sure that the battery is attached to the adhesive (or buy it separately).The original Xiaomi adhesive is a double-sided 0.3mm thick tape, but the versatile 3M 9448A will do as well.

Battery Replacement Tools: What You Need

To disassemble the Redmi 4 and replace the battery, you will need:

Plastic blades (mediators) – 2-3 pcs.|The screwdriver. PH00 (magnetic)|Tweezers with curved ends|Hair dryer or thermo-air station (for softening glue)|New battery with adhesive base|Isopropyl alcohol (90%+) clean-up-->

Where to buy tools:

• 🛒 Smartphone repair kits are sold on AliExpress (price from 300 rubles) or in radio stores.
• 🔧 Screwdriver. PH00 substitute PH0, But it has to be thin so as not to break the screws.
• 🔥 Instead of a hair dryer, a powerful household (hot air mode) will suit, but keep it at a distance of 10-15 cm so as not to melt the plastic.

If you don’t have experience disassembling equipment, practice on an old phone or watch YouTube video instructions (see “Xiaomi Redmi 4 battery replacement”).

• 📌 How to gently slap the cover without damaging the latch.
• 📌 Where hidden screws are located (for example, under stickers).
• 📌 How to properly disconnect the battery plume without breaking it.

⚠️ Warning: Do not use metal blades or knives to lid the lid! Even a small scratch on the aluminum case can become a hotbed of corrosion, and in the worst case - close contacts on the board.

Step-by-step: how to disassemble Xiaomi Redmi 4 and replace the battery

The replacement process will take 30-60 minutes, follow the instructions strictly in order to avoid damaging the plumes or board.

Step 1: Turn off the phone and prepare

Before the disassembly:

1. Turn off the phone (press the power button and select "Switch off").
2. Extract. SIM-card and memory card (if any).
3. Remove the case and clean the case of dust (you can wipe with alcohol).

Step 2: Removal of the back cover

The back cover of Redmi 4 is held on latches and glue, so that it can be removed.

1. Heat the edge of the body with a hair dryer (especially near the buttons and charging connector) for 1-2 minutes.
2. Insert the plastic blade into the gap between the lid and the body (start with the lower right corner where the charging connector is).
3. Carefully drive the shoulder blade around the perimeter, snapping the clamps. If the lid does not respond, warm up again.

Step 3: Disconnect the battery plume

After removing the cover, you will see:

• The battery (takes up most of the body).
• Battery plume (a thin black wire going to the motherboard).
• Screws that fix the metal plate over the plume.

So, act like this:

1. Unscrew all the screws on the metal plate (they can be of different lengths - remember where it was!).
2. Carefully tuck the plate with tweezers and remove it.
3. Unplug the battery plume with a plastic blade. Don't pull the wire! The plume is fragile and can come off.

Step 4: Remove the old battery

The battery is glued to the body to remove it.

1. Put a plastic blade on the battery from any angle and pull it up. If the glue is strong, warm up with a hair dryer (but don't overheat!).
2. If the battery is swelling, don't puncture it! Carefully remove it without deforming.
3. Clean the place under the battery from glue residues with isopropyl alcohol.

Step 5: Installation of a new battery

Before installation:

• Make sure that the new battery contacts match the old ones.
• Remove the protective film from the glue base (if any).
• Press the battery to the body, making sure it lies flat.

Then:

1. Connect the plume to the motherboard (a click should be heard).
2. Set a metal plate and twist the screws (do not pull!).

Step 6: Build the phone

Collect the phone in reverse order:

1. Put the slacks down (do not squeeze them!).
2. Close the back cover, starting at the top (where the camera is) and it should snap effortlessly.
3. Turn on the phone and check the charge: if it shows 0%, connect the charger for 10-15 minutes.

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After you change the battery, be sure to calibrate the battery: completely discharge the phone, then charge to 100% without interruption. Repeat the cycle 2-3 times. This will extend the life of the new battery.

Common Mistakes When Replacing a Battery and How to Avoid Them

Even the most experienced craftsmen sometimes make mistakes that cause the phone to break down.

• 🔧 The screws in Redmi 4 are soft, and if you pull them over or use the wrong screwdriver, they're easy to rip off. Solution: use a magnetic screwdriver. PH00 and don't use force.
• 🔌 A broken battery plume, often torn by a careless disconnect, solution: only use a plastic blade to pull the plume, not a nail or metal.
• 🔥 If you heat the board too long, you can get the little parts soldered off. Solution: heat it in short intervals (20 to 30 seconds) and let the body cool down.
• 📱 If the latches are not fixed, the lid will dangle. Solution: make sure all the clamps are in place (especially in the corners).

If the phone is not switched on after replacement:

1. Check if the battery is connected to the board.
2. Make sure the battery is not swelled and the contacts are not oxidized.
3. Connect the charge for 10-15 minutes – sometimes the new battery is discharged “to zero”.

⚠️ Warning: If the phone turns on after assembly but doesn't charge, it's likely that the motherboard's power controller is damaged, and you'll need a diagnostic at the service center.

How long will the new battery last and how to extend its life

The battery life depends on its quality and operating conditions.

• 🔋 Original battery: 3-5 years (500-800 charge cycles).
• 🔋 Quality analogue: 1.5-3 years (300-500 cycles).
• 🔋 Cheap analogue: 6-12 months (100-200 cycles).

To extend the life of the battery:

• 🔌 Avoid full discharge (charge at 10-20% charge).
• ⚡ Do not leave your phone on charge overnight (optimally 80-90% charge).
• 🌡️ Do not use your phone in temperatures below 0°C or higher than 35°C.
• 🔄 Calibrate once every 3 months (full discharge) + charge).

It's also worth turning off background processes that drain the battery quickly.

1. Go to Settings → Battery → Battery Use.
2. Limit the activity of applications that consume more than 5% of the charge.
3. Turn off auto-update applications in Settings → Apps → Autoboot.

FAQ: Frequent questions about replacing the battery with Xiaomi Redmi 4