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

Xiaomi Redmi 4X

Many users are afraid to disassemble their smartphone for fear of damaging the plumes or display. However, replacing the battery with a Redmi 4X is a complete task even for a beginner, if you follow clear instructions and use the right tools. In this article, we will discuss the entire process from choosing a new battery to building a phone, and also explain how to avoid typical errors.

Redmi 4X

Signs that the Redmi 4X battery needs to be replaced

Before you start disassembling your phone, make sure the battery is the problem. Here are the key symptoms of a dying battery:

• 🔋 Phone's running out of power. 2-3 hour with moderate use (previously kept the charge for a day).
• 📉 The percentage of charge “jumps” (for example, from 50% immediately drops to 15%).
• 🔌 The smartphone is turned off when 20-30% charge and only activated after connection to charging.
• 🔥 The battery swelled (seen on a raised display or body).
• ⚡ The phone warms up more than usual during charging or work.

If you know at least 2-3 items from the list, most likely, the battery is worn out. You can check its condition through the engineering menu: enter the code ##4636## in the dialer, then go to the Battery Information section. Pay attention to the “Wear Level” parameter (if it is above 50%, it is time to change the battery).

It's also useful to use apps like AccuBattery (available on Google Play) that show the actual battery capacity, for example, if you're not using the battery. 4100 The machine shows 2000-2500 This is a direct signal to replace.

⚠️ Warning: If the battery is swollen, don't delay replacement! This is dangerous: the battery can damage the display or even ignite when mechanically exposed.

Which battery to choose for Redmi 4X: original or analogue?

There are three types of batteries available for the Redmi 4X:

1. The original (from Xiaomi) is the most reliable, but also the most expensive. Article: MBJ407450 or MDY05EM. Capacity: 4100 mAh.
2. Licensed analogues (for example, from ZMI, Baseus, Remax) are 30-40% cheaper than the original, but often do not inferior in quality.
3. No-name batteries (from AliExpress, eBay) are the cheapest, but risky ones. They can have undercapacity or poor controller boards.

We recommend you to stay on the first or second option — 1500-2000 rupees, licensed analogue — 800-1200 Buy only from trusted sellers (for example, in official Xiaomi stores or on the Internet). Wildberries/Ozon high-rated).

When buying, pay attention to:

• 📦 Packaging – the original batteries come in a proprietary box with a hologram.
• 🔍 Marking – the battery must be marked with a model (Redmi) 4X), capacity and production date.
• 🔋 Controller – quality batteries have protection against overheating and short circuit.

Preparing for replacement: security tools and measures

To replace the battery with the Redmi 4X, you will need:

• 🔧 Plastic blades (or mediators) - to separate the body.
• 🔨 Cross screwdriver (size) PH00) — screw-off.
• 🧴 Isopropyl alcohol (90%+) — glue-softener.
• 🧲 Suction - to raise the display (optional).
• 🔥 Hair dryer - to heat the glue (optional, but simplifies the process).
• 🛡️ Gloves - to protect against alcohol and glue.

Also prepare the workplace:

• Work on a clean table with good lighting.
• Use an antistatic mat or at least don’t wear wool clothing (static electricity can damage the board).
• Turn off the phone and remove it. SIM-memory-card.

⚠️ Warning: Do not use metal tools to tamper with the battery - this can lead to short circuit! 1-2 minutes - risk of ignition.

If you’ve never taken a smartphone apart, practice on an old device or watch YouTube video instructions (like those from Repair Universe or iFixit channels) to avoid mistakes.

Step-by-step: how to disassemble the Redmi 4X and remove the old battery

Now, to the most critical part of the process, which is disassembling the phone, follow the instructions carefully.

1. Removing the back cover on the Redmi 4X, the cover is mounted on the latches, carefully tuck it with a plastic blade from the bottom edge (where the charging connector is) and slowly lead along the body. If the cover does not lend itself, heat it slightly with a hair dryer (temperature not higher than 60 ° C).
2. You'll see 10 screws under the lid, unscrew them with a cross screwdriver and put them in a separate box so you don't lose them. Attention: screws of different lengths -- remember where you were!
3. Carefully lift the plastic latch on the battery connector (white or black) and disconnect the plume. Use the shoulder blade to avoid damaging the contacts.
4. Removal of the battery is glued to the body. To remove it: Apply isopropyl alcohol on the edges of the battery (it dissolves the glue). Wait 2-3 minutes. Carefully tuck the battery into a plastic blade starting at the top edge. If the battery does not move, add the alcohol and repeat the process.

Under no circumstances pull the plume!

If the battery is swollen, be especially careful not to pierce it or bend it. Better wear safety glasses.

Installation of a new battery and build Redmi 4X

When the old battery is removed, start installing a new one:

1. Check the battery for damage, make sure the capacity and model match the old one (4100 mAh, MBJ407450).
2. Battery installation: Put the battery in the socket, matching the contacts. It should lie flat, without skewing. If the battery is hanging, check if there's any old glue left.
3. Carefully connect the battery connector to the motherboard and snap the lock. Make sure the contacts are not bent.
4. Check before assembly Connect the phone to charge (don't turn it on!) If the charging indicator appears on the screen, then the battery is connected correctly.
5. Body assembly Twistle all screws (don't pull!) Make sure no plume is squeezed. Then snap the back cover starting at the top edge.

If after the battery change, the phone has become worse at keeping the charge than the new battery, there are two possible reasons:

1. You bought a fake battery with an understated capacity.
2. The power controller on the motherboard is damaged (diagnosis is required in the service center).

In the first case, return the battery to the seller, in the second - contact the specialists.

💡

If you're not sure about your abilities, you should trust a battery replacement to professionals, and the cost of working in a service center is 500-1000 rubles, which is cheaper than repairing a damaged board.

How to extend the life of a new battery Redmi 4X

To make the new battery last longer, follow these tips:

• 🔌 Avoid full discharge – recharge your phone when 10-20% charge.
• ⚡ Do not use "fast charging" all the time - it accelerates battery wear. 5V/1A.
• 🌡️ Don’t overheat your phone – don’t leave it in the sun or near heat sources.
• 📵 Disable unnecessary functions — GPS, Bluetooth, mobile data in the background reduces the time of operation.
• 🔄 Calibrate the battery once every 3 months – completely discharge the phone, then charge to 100% without interruptions.

It is also useful to turn off the background activity of applications:

1. Go to Settings → Applications → Permissions → Autorun.
2. Turn off auto-start for unnecessary programs.
3. In Settings → Battery → Power mode, select “charge savings”.

If you use the Redmi 4X as a second phone and it often lies idle, store it with a charge of 40-60%. Prolonged storage with full or zero charge harms the battery.

FAQ: Answers to Frequent Questions About Replacing a Battery