Replacement of the battery with Xiaomi Redmi 5A: from battery selection to assembly

Xiaomi Redmi 5A — One of the most popular budget smartphones released in the 2017 Despite its modest performance, the device is still in use today because of its reliability, but over time, even the most enduring technology fails: the battery loses capacity, the phone starts to turn off on the phone. 30-40%, And the charge lasts only a few hours. 5A Been “sitting down” for half a day or refuses to turn on without connecting to a charger – it’s time to replace the battery.

In this article, we will analyze the step-by-step replacement of the battery on Xiaomi Redmi. 5A From choosing a quality battery to building the body properly, you will learn what tools you need, how to avoid common errors (such as damage to plumes), and what to do if the phone does not turn on after replacement. BM43 — Original battery for Redmi 5A, frequently-fake.

Should you go to the service or can you do it yourself? If you have the patience and the precision to replace the battery with your own hands, it's very real. The main thing is to follow the instructions and take your time. And for those of you who have never taken a smartphone apart, we've put together a list of critical moments where a mistake can turn into a breakdown.

Signs that the Redmi battery 5A change

How do you know if the battery is the problem, not the software failure or the charger? Here are the key symptoms of a worn-out battery:

• 🔋 The phone turns off when 20-30% charge and only activated after connection to charging.
• ⚡ Charging occurs in jerks: the percentage rises and falls (for example, from 50% to 30% per minute).
• 🔥 The body is noticeably heated in the battery area even with minimal load.
• ⏳ The Autonomous Work Time has been reduced in 2-3 compared to the new device.
• 📉 In battery settings (Settings) → Battery) shows a state of "Replacement required" or a capacity below 70%.

If at least 2-3 The list of items about your Redmi 5A — It's probably worn out, and you can check it with apps like AccuBattery (available on Google Play), and it'll show you the actual battery capacity and the number of charging cycles. 5A critical is the drop in capacity below 2000 mAh (original — 3000 mAhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh).

⚠️ Note: If the phone suddenly turns off 50-60% If you're charging, it could be a sign not only of battery wear, but also of a power controller malfunction, and if you're changing the battery, you might not be able to do that, you'll need to have a card diagnostic.

Another test: connect Redmi 5A If the charge indicator flashes or the phone turns on after only a few attempts, this is also a signal of problems with the battery or power chain.

What battery to choose for Xiaomi Redmi 5A: original vs analogue

Original battery for Redmi 5A markable BM43 And it's a rated capacity of 3,000 mAh, but it's hard to find it on sale today, because Xiaomi has long since retired the model:

1. Original batteries (if you are lucky to find in warehouses or in service centers) The cost is from 1500 to 2500 rubles.
2. Quality analogues from proven brands (Baseus, Remax, Patona — 800-1200 ruble.
3. No-name batteries of unknown origin (often marketed as "original") 500-700 RUB, but the risk of running into a fake is high.

How do you tell a quality battery from a fake battery?

• 🏷️ Marking: The original must have an inscription BM43, production date and hologram.
• 📦 Packaging: branded batteries are sold in sealed film with the Xiaomi logo.
• 🔧 Contacts: For counterfeits, they are often oxidized or have uneven edges.
• 📏 Size: The original battery fits tightly into the nest without gaps.

Where to buy? Best options:

• 🛒 Xiaomi's official stores (if available).
• 🔧 Service centers specializing in Xiaomi.
• 🌍 Verified online sites: AliExpress (sellers with a rating of 98%+), Beru, Ozon.

⚠️ Do not buy batteries that say "For Redmi". 5/5A/5 Plus, they might not fit on the connector or the tank. BM43 for Redmi 5A.

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Check the seller's reviews before you buy, and fakes are often disguised as originals, with holograms and stickers added to the package, and if the price is below 800 rubles, you should be wary.

Battery Replacement Tools: What You Need

For self-replacement of the battery on Redmi 5A You'll need a minimum set of tools, and without them, the risk of damage to plumes or the body increases significantly:

• 🔧 Plastic blades (2-3 (p.c.) to separate the shell.
• 🔨 Cross screwdriver (preferably magnetic) for screws.
• 🧲 Suction (optional) for suction of the back cover.
• 🔥 Hair dryer or thermo-air station for softening glue.
• 🧴 Isopropyl alcohol (90%+) clean-up.
• 📦 New bilateral scotch (if the old one has lost its stickiness).
• 🛠️ Tweezers for neatly detaching plumes.

Where to buy tools? Smartphone repair kits are sold on AliExpress, in radio stores or on Avito, and the full kit costs between 300 and 1,000 rubles. If you don't plan on doing regular repairs, you can do with plastic blades and a screwdriver.

Important nuance: in Redmi 5A The back cover is glued to the body, not the latches, as in the newer models. So it's hard to do without a hair dryer, because you have to warm up the glue so you don't damage the plastic. 10-15 minutes (temperature should be about three minutes) 50-60°C).

Turn off the phone and remove it. SIM-map|Charge the battery to 30-50% (safe)|Prepare a workplace with good lighting|Take a picture of the location of screws and plumes|Wear an antistatic bracelet (optional)-->

How to disassemble Redmi 5A and replace the battery

Now, to the most critical stage, disassembling the phone and replacing the battery, follow the instructions carefully so that you don't damage the plumes or the board.

Step 1: Disconnect and heat the body

1. Turn off Redmi. 5A and remove the tray for SIM-map.

2. Warm up the back cover with a hair dryer (keep at a distance) 10-15 temperature — 50-60°C) during 2-3 It'll soften the glue.

3. Gently apply the lid with a plastic blade starting at the bottom edge (near the microUSB connector). If the lid fails, warm up for another 1 minute.

Step 2: Disconnecting the plumes

1 Unscrew 8 screws that fix the metal plate (they are of different sizes - remember the location of each!).

2. gently lift the plate and put it aside.

3. Unplug the battery plumes, the display and the power buttons with tweezers. Don't pull the wires! Lift the connector.

Step 3: Remove the old battery

1. Put a plastic blade on the battery on either side. If it is glued heavily, you can warm it up a little with a hair dryer (no more than 1 minute!).

2. Take the battery out carefully without bending it. If it's swelling, don't puncture it! It can cause fire.

3. Clean the socket of glue residues with isopropyl alcohol.

Step 4: Installation of a new battery

1. Check the contacts of the new battery - they must coincide with the old ones.

2. glue bilateral tape to the back of the battery (if it does not come with the kit).

3. Set the battery in the nest and press on 10-15 seconds.

4. Connect the battery plume to the board.

Step 5: Assembly of the phone

1. Connect all the plumes back (display, buttons, speaker).

2. Install a metal plate and twist the screws (observe order!).

3. glue the back cover. If the glue has lost its properties, use a new one (for example, B-7000).

4 Turn on the phone and check the charge. If it is not detected, turn off and check the connection of the battery plume.

⚠️ Warning: If you notice a bloated battery when disassembling, don't use metal tools to remove it! Puncture of a bloated battery can lead to a fire.

Common mistakes when replacing battery packs and how to avoid them

Even experienced users sometimes make mistakes that cause their phones to break down, and here are the most common ones and ways to prevent them:

• 🔧 Tangled screws: at Redmi 5A You use screws of different lengths, and if you screw a long screw into a place for a short one, you can damage the board. Solution: put the screws in order or take pictures of their location.
• 🔌 Damaged plumes: a display plume or battery can be easily broken if you pull the wires. Solution: lift just behind the plastic connector, not behind the wires themselves.
• 🔥 Battery overheating: If you heat it too much with a hair dryer, you can melt the plastic or damage the battery.Solution: Keep the hair dryer at a distance 10-15 cm and don't heat up any longer 3 minute.
• 📵 Misassembly: A forgotten screw or an unconnected plume can cause the phone to fail. Solution: Check each build step against the photos taken before disassembly.

Another common problem is that the phone doesn't see the new battery, and the reasons may be:

• Bad contact of the plume (check if it is inserted to the end).
• Non-original battery with the wrong resistance (replacement with quality).
• Failure of the power controller (fixing or repair of the board is required).

If the battery is discharged quickly after replacement, it may not be calibrated.

1. Completely discharge the phone before turning off.
2. Charge to 100% without interruption.
3. Repeat the cycle 2-3 times.

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The most common mistake is to use inappropriate tools (e.g., an iron screwdriver instead of a plastic shoulder blade) that results in scratches on the body or damage to the plumes. Invest in a quality repair kit!

Cost of replacement of battery in the service vs self-repair

If you're not sure about your own abilities, you can go to a service center. How much will it cost?

For comparison, a self-replacement will cost in:

• 🔋 Battery: 800-2500 ₽ (depending on the quality).
• 🔧 Tools: 300-1000 ₽ (buy a set).
• 🧴 Additional: glue, alcohol - up to 200 ₽.

When should I contact the service?

• If the phone is warranty (self-repair cancels it).
• If the battery is swelled or damaged (fire risk!).
• If the phone does not turn on after replacement or there are errors.

Advantages of self-replacement:

• ✅ Savings of up to 50% of the cost.
• ✅ Quality control (you choose the battery yourself).
• ✅ Experience that will be useful for repairing other devices.

Disadvantages:

• ❌ The risk of damaging your phone without experience.
• ❌ There is no guarantee for the work (only for the battery itself, if you bought with a guarantee).
• ❌ It will take time and patience.

What to do after battery replacement: calibration and care

Installing a new battery is only half the battle, and to make it last longer, you have to calibrate it properly and follow the rules of operation.

Calibration of the battery:

1. Completely discharge the phone before turning off.
2. Charge up to 100% without interruptions (preferably with the original charger).
3. Turn off the charge and again discharge to 0%.
4. Repeat the cycle 2-3 times.

This will help the power controller to correctly determine the capacity of the new battery.

Rules for the care of the battery:

• 🔌 Don’t use cheap chargers – they can damage your battery.
• 🌡️ Avoid overheating (do not leave your phone in the sun or near heat sources).
• 🔋 Try to keep the charge in range 20-80% — This extends the life of the ABC.
• 📵 Do not discharge your phone to 0% regularly – it is better to recharge more often.

It is also recommended to disable battery optimization for critical applications (Settings) → Battery. → Optimize your battery and avoid using your phone while charging (especially for games or videos).

If 1-2 After a month of replacement, you notice that the battery is again quickly setting down, check:

• Are there any energy-intensive applications (for example, cryptominers) installed?
• Not on all the time. GPS or mobile data in the background.
• Is the battery itself damaged (swelling, overheating).

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Modern lithium polymer batteries do not have a “memory effect”, so they do not need to discharge to 0% before charging.

Frequent questions about replacing the battery with Xiaomi Redmi 5A