Replacing the battery with Xiaomi Redmi 4A: a complete guide with photos and tips

Xiaomi Redmi 4A is still popular even years after its release, thanks to its reliability, low price and maintainability. However, over time, any battery loses capacity: the phone starts to run out in a few hours, turns off at 20-30% charge or refuses to turn on at all. If your Redmi 4A is holding onto the outlet, it’s time to think about replacing the battery.

Many users are afraid to disassemble their phone for fear of damaging the board or screen, but it's actually easier to replace the battery on this model than on flagships with adhesive modules, the main thing is to prepare properly, choose a quality battery and follow the instructions. In this article, we'll look at everything from fault diagnosis to after-switch assembly, taking into account the typical errors and nuances of the Redmi 4A.

⚠️ Important: If the phone doesn't turn on even when you're connected to charging, the problem may not be the battery, but the power controller or the connector.

How to know if the battery is time to change: 5 obvious signs

The Xiaomi Redmi 4A battery is designed for 500-800 charge cycles, after which its capacity is reduced to 70-80% of the original. But how to distinguish natural wear and tear from software failures?

• 🔋 Phone's running out of power. 2-3 hours in normal use (social networks, messengers).
• 📉 The percentage of charge “jumps”: for example, from 40% immediately drops to 15% after a reboot.
• 🔌 Redmi 4A turns off when connected to a charger or does not turn on without it.
• ⚡ The charge is extremely slow (more than that). 4-5 hourly 100%) or 80-90%.
• 🌡️ The phone heats up strongly in the battery area (especially when charging).

If you know at least 2-3 items from the list, it's time to change the battery. For accurate diagnosis, you can use applications like AccuBattery (showing real capacity) or a built-in menu of engineering codes:

#4636## → "Battery information"

Here, look at the level and health settings, and if the battery is below "Good," it's running out of life.

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

The original battery for the Redmi 4A is BM43 and has a capacity of 3120 mAh. However, after 2019, Xiaomi does not officially supply spare parts for this model, so you will have to choose among analogues.

We recommend that you stay on high-quality analogues with a capacity of no more than 3200 mAh - they are safer than the "enlarged" options and cheaper than the original.

• 🔍 Protection against overheating and short circuit (should be marked) PTC protection IC).
• 📦 Package: the set must have adhesive strips for fixation.
• 🛡️ Warranty of at least 6 months (proven vendors like AliExpress or Beru).

⚠️ Warning: Batteries with a capacity above 3,500 mAh often lack protection against overcharging, which can cause the phone board to swell and damage.

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Before buying, check the reviews about the seller - often under the guise of original batteries sell fakes with a capacity of 2 times lower than the declared.

Preparing for replacement: tools and safety

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

• 🔧 Plastic mediator (or guitar) - to separate the body.
• 🔨 The screwdriver (PH00 or PH0) — screw.
• 🧲 Magnetic mat or container – so as not to lose screws.
• 🔥 Hair dryer or thermoplatform - for softening the glue (optional).
• 🧴 Isopropyl alcohol (90%+) — clean-up.
• 📱 New battery with adhesive stripes.

Also prepare the workplace:

• 🪑 Work at a table with good lighting.
• ⚡ Turn off the phone from charging and completely discharge (up to 0%) – this minimizes the risk of short circuit.
• 🧤 Wear an antistatic bracelet or periodically touch a grounded object (such as a heating battery).

⚠️ Warning: Don't use metal tools to tamper with the body, they can damage the plastic latches. If there's no mediator, take a plastic card.

Turn off the phone and recharge to 0%|

Take it down. SIM-memory-card|

Prepare tools and a new battery|

Take a picture of the location of the screws before disassembling-->

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

The process of replacing the battery with the Redmi 4A takes 20-30 minutes and consists of 5 steps. Follow the instructions carefully - errors at any step can lead to damage to the plumes or board.

Step 1: Removing the back cover

1. Place the phone with the screen down on a soft surface (for example, a napkin).

2. Heat the hair dryer edge of the back cover for 1-2 minutes (temperature ~60 ° C) - this will soften the glue.

3. Insert the mediator into the gap between the cover and the body at the headphone jack and carefully lead along the perimeter, snapping the clamps.

Step 2: Disconnect the plumes and batteries

1. Unscrew 11 screws (9 cruciform and 2 under the hexagon at the speaker).

2. Gently disconnect the battery plume (it is under a black insulation tape). Use a plastic spatula!

3. Turn off the display plumes, cameras and touch buttons (they are fixed by latches - put them up).

⚠️ Attention: Don't pull the plumes, they're fragile! If you don't make contact, check if all latches are bent.

Step 3: Remove the old battery

1. Put a plastic blade on the battery on either side. If it's glued heavily, use a thread (sink it under the battery and saw the glue).

2.Do not make excessive efforts - inside the battery a liquid electrolyte, which can leak if the shell is damaged.

3. After extraction, inspect the contacts on the board. If oxidized, clean them with an alcohol tampon.

Step 4: Installation of a new battery

1. Remove the protective film from the adhesive strips of the new battery and press it to the installation site.

2. Connect the battery plume to the board. Make sure the contacts match!

3. Secure the battery with tape (if there are no adhesive strips in the kit).

Step 5: Assembly of the phone

1. Connect all the plumes in reverse order. Start with the touch buttons, then the display and the camera.

2. Twirl the screws (do not pull!).

3. Install the back cover, starting with the headphone jack, and click it around the perimeter.

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Turn on your phone and check all the modules: camera, speaker, sensor and charger. If something doesn't work, take the phone apart and check the plumes.

Common Mistakes When Replacing a Battery and How to Avoid Them

Even with careful disassembly, you can make mistakes that will cause your phone to break down, and here are the most common ones and ways to prevent them:

Another common problem is that the phone doesn't turn on after assembly, and the reasons may be:

• 🔌 Unconnected battery plume (check contacts).
• 🔋 New battery discharged (plug charging on) 10-15 minute).
• 🛠️ The power connector on the board is damaged (repair in the service is needed).

How to prolong the life of a new battery: 7 rules of charging

To make the new battery on the Redmi 4A last longer, follow these guidelines:

• 🔌 Use the original charger (5V/2A) or certified from well-known brands (Baseus, Anker).
• 📴 Avoid the full discharge (charge when you are in charge). 10-20% charge and recharge (unplug from the network on the 80-90%).
• 🌡️ Do not use your phone while charging in hot areas (above 30)°C).
• 🔋 Once 2-3 Calibrate the battery for a month: completely discharge the phone, then charge to 100% breaklessly.
• 📵 Turn off Wi-Fi, Bluetooth and GPS, If they are not needed, it reduces the cost of charge.
• 🌙 Turn on a dark theme and reduce the brightness of the screen to 50-60%.
• 🔄 Update the firmware - in new versions MIUI Optimized energy consumption.

Compliance with these rules will help to keep the battery capacity at 80-90% even after 2 years of use.

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