Replacement of the battery in Xiaomi Redmi 5A: a complete guide with photos and nuances

Xiaomi Redmi 5A is one of the most popular budget devices of the brand, but even its reliable battery capacity of 3000 mAh loses capacity over time. If the phone runs out in a few hours, turns off at 20-30% charge or the case is swollen, it’s time to change the battery. In this article, you will find a step-by-step photo instruction, a list of necessary tools and tips on how to avoid errors when replacing.

The procedure doesn't require a soldering iron or special skills, but it does require care: inside the Redmi 5A, thin plumes and brittle latches, we'll tell you how to disassemble the phone without damage, check the new battery before installing it, and properly assemble the device back, and where to buy a quality battery and how to avoid a fake.

Signs that it is time to change the battery

The battery in a smartphone is a consumable, and even when used carefully, it degrades after 2-3 years.

• 🔋 The phone discharges in 3-4 hours with moderate use (previously held a day).
• 📉 The percentage of charge “jumps” (for example, from 40% immediately drops to 15%).
• 🔌 The device is switched off when 20-30% charge and not activated without recharging.
• 📱 The body swelled or there were gaps between the screen and the back cover.
• ⚡ The phone gets very hot when charging or working.

If you notice at least 2-3 signs from the list, check the battery status through the application AccuBattery (available on Google Play), which will show the actual capacity of the battery. For example, if instead of the declared 3000 mAh program produces 1800-2000 mAh, the battery is worn out by 30-40% and must be replaced.

⚠️ Warning: If the Redmi 5A body is swelling, don't delay replacement! A bloated battery can damage the screen or motherboard, and in rare cases, ignite. Don't try to prick or squeeze the battery!

Which battery to choose for Redmi 5A: original vs analogues

The original battery for Xiaomi Redmi 5A is labeled BM43 (or DM43 for some batches) and has a capacity of 3000 mAh. However, after 2020, Xiaomi stopped supplying the original batteries retail, so the market is dominated by analogues.

We recommend buying batteries from trusted manufacturers:

• 🔹 Sunwoda is a supplier of batteries for Xiaomi (original batteries are often produced under this brand).
• 🔹 Desay is another official partner of Xiaomi, with a good price/quality ratio.
• 🔹 Patona is a German brand specializing in smartphone batteries.

Buy batteries from trusted stores: AliExpress (those with a 98 percent+ rating), Beru, Svyaznoy or M.Video. Avoid markets and small online stores with suspiciously low prices.

Preparing for replacement: tools and safety

To replace the battery in the Redmi 5A, you will need:

• 🔧 Plastic mediator (or guitar mediator) - to disengage the body.
• 🔧 Cross screwdriver (size PH00 or PH0) - for screws.
• 🔧 Suction cup (optional) - helps to squeez the back cover.
• 🔧 Tweezers to carefully detach the plumes.
• 🔧 Isopropyl alcohol (70%+) — clean-up.
• 🔧 Thermoclei or bilateral scotch to fix the new battery.

Also prepare the workplace:

• 📱 Work on a flat surface with good lighting.
• 📱 Turn off the phone and remove the SIM- card and memory card.
• 📱 Discharge the battery to 20-30%, which will reduce the risk of short circuit.
• 📱 Wear an antistatic bracelet (or touch a grounded object periodically) to avoid static discharge.

⚠️ Warning: Don't use metal tools to lid the lid -- they can damage plastic latches! If you don't have a plastic mediator, wrap the flat screwdriver with tape.

Unload the phone before 20-30%|Extract SIM-card|Prepare tools (mediator, screwdriver, tweezers)|Cleaning the workplace of garbage|Wear an antistatic bracelet (or ground up)-->

How to disassemble Redmi 5A and replace the battery

Follow the instructions carefully - every step is important for the safety of the phone. If in doubt, take a picture of the location of the plumes and screws before disconnecting, so as not to confuse the assembly.

Step 1: Removing the back cover

The Redmi 5A has a removable back cover, but it's mounted on the latches to remove it.

1. Insert a plastic mediator into the gap between the lid and the case at the headphone jack.
2. Carefully drive the mediator along the edge, snapping the clamps. Don't force it, the lid should come off with a slight crack.
3. Once all latches are unclogged, remove the lid, and if it doesn't respond, make sure the corners are not latched.

Step 2: Shutting off the battery

Before touching the internal components, disconnect the battery:

1. Put a plastic blade on the battery and find a power plume (a black connector with red and black wires).
2. Carefully lift the connector up using tweezers. Don't pull the wires!
3. Check that the phone is completely de-energized (the screen does not respond to the power button).

Step 3: Remove the old battery

The battery in the Redmi 5A is glued to the body to remove it.

1. Put a plastic shoulder blade on the battery from any angle.
2. If the glue is too strong, gently pull the black tape (traction strap) that is under the battery.
3. Don’t use metal tools – they can puncture the battery!
4. After extraction, inspect the body for the presence of glue residues and clean the contacts with alcohol.

Step 4: Installation of a new battery

Before installing, check the new battery:

• 🔍 Make sure the capacity matches 3,000 mAh.
• 🔍 Check the integrity of the contacts and no bloating.
• 🔍 Apply the battery to the case, and it should lie tightly without gaps.

For fixation:

1. Apply thermoglue to the back of the battery (thin layer, no excess).
2. Carefully set the battery in place and press for 10-15 seconds.
3. Connect the power plume to the motherboard.

Step 5: Assembly of the phone

Collect the phone in reverse order:

1. Install the back cover, starting from the top (at the headphone jack).
2. Carefully press the lid until all latches click.
3. Turn on the phone and check the battery charge (the correct value should be displayed).

Frequent Mistakes and How to Avoid Them

Even with a careful replacement, you can make mistakes that will cause problems, and here are the most common problems and ways to prevent them:

• 🚫 Damage to the battery plume -- don't pull the wires, just the connector -- if the plume is broken, you can solder it to the service center.
• 🚫 Smooth fit of the lid -- if the latches are not locked, the phone can creak or disassemble when it falls. Check all the edges of the lid.
• 🚫 Overheating after replacement - if the new battery is warming, check if it is bloated (fault defect).
• 🚫 Fast discharge – if a new battery goes down in a few hours, it may be fake (check the actual capacity through AccuBattery).

If after the replacement, the phone began to restart itself or does not hold a charge, the reason may lie in:

• 🔌 Faulty power controller on motherboard (diagnosis required).
• 🔋 Broken battery (try replacing it with another one).
• 📱 Damaged charging connector (check if it is wobbling).

💡

If the phone is slower after the battery is replaced, reset to factory settings (Settings → Additional → Restore and Reset).

How much does it cost to replace the battery in the service vs independently?

The cost of replacing the battery in the Redmi 5A depends on where you spend it.

Self-replacement is beneficial if you are confident in your abilities, but if the phone is warranty (even if it will soon run out), it is better to contact the official service, otherwise the warranty will be canceled.

If you choose a service, check:

• 🔍 Work guarantee (minimum 3 months)
• 🔍 Reviews of the workshop (on Yandex.Maps or 2GIS).
• 🔍 What battery is installed (ask for a photo of the original packaging).

💡

If you've never taken your phones apart, practice on an unnecessary device or watch Redmi 5A video disassembly on YouTube, which will help you avoid mistakes when working with latches and plumes.

How to prolong the life of a new battery

To make the new battery in the Redmi 5A last longer, follow these tips:

• 🔋 Avoid full discharge – charge your phone at 15-20% charge.
• 🔌 Do not leave on overnight charging - it is optimal to charge up to 80-90%.
• 🌡️ Do not use your phone in extreme temperatures (below 0)°C or higher than 35°C).
• 📵 Disable unnecessary features (GPS, Bluetooth, autobrightness) if not in use.
• 🔄 Calibrate the battery once every 2-3 months: completely discharge the phone, then charge to 100% without interruptions.

It is also worth turning off background processes for unnecessary applications:

1. Go to Settings → Applications → Permissions → Autorun.
2. Turn off auto-start for applications that you rarely use.
3. In Settings → Battery → Battery mode, select “Saving Charge”.

By following these rules, you will extend the life of the battery by 20-30% and avoid rapid degradation.

FAQ: Frequent questions about battery replacement in Redmi 5A