Replacement of the battery on Xiaomi Mi 5: step-by-step analysis with photos and nuances

Xiaomi Mi 5

battery degradation

Mi 5

Replacing the battery on your own with the Xiaomi Mi 5 is a medium-sized task that requires accuracy and the right tools. Unlike modern smartphones with adhesive connections, the Mi 5 has a relatively simple design, but it has its pitfalls: the fragile plume of the fingerprint scanner, the risk of damaging antenna contacts and the need to properly calibrate the new battery. In this article, we will discuss the entire process from selecting a spare part to final assembly, and also explain how to avoid typical errors.

If you’ve never taken a smartphone apart, we recommend watching YouTube videos first (like the “Repair Universe” or “Xiaomi Repair” channels) to help you visually assess the complexity of the task. 40-60 minutes, but the newcomers should be given 1,5-2 One hour and be patient.

1. Signs of battery wear and diagnosis

Before you start replacing, make sure that the battery is the problem.

• ⚡ The smartphone is running out of power. 2-3 One hour with moderate use (previously kept the day).
• 🔋 The percentage of charge "jumps" (for example, from 40% immediately to 15%).
• 📉 Mi 5 switch off 20-30% although it had previously been used before 5-10%.
• 🔥 The body swelled (see the gap between the screen and the frame or the “slamming” display when pressed).

For accurate diagnosis, use applications like AccuBattery (showing real capacity) or a built-in menu of engineering tests:

1. Dial in ##4636###.
2. Select Battery Information.
3. Compare the current capacity with the passport capacity (3,000 mAh). If the difference is greater than 30%, the battery must be replaced.

⚠️ Warning: If the body of the Mi 5 is swelling, don't delay replacement! a bloated battery can damage the display, motherboard or even ignite when mechanically exposed.

If the smartphone doesn't turn on at all, check the charger and cable first. Connect the Mi 5 to a PC -- if the charging indication appears, the battery isn't the problem. If there's no reaction, try charging another phone with the same cable: it might be the power supply.

2. Battery selection: original vs analogues

The original battery for Xiaomi Mi 5 is marked BM43 (or BM44 for versions with NFC) and a capacity of 3000 mAh. However, to find a new original today is almost impossible — Xiaomi has long since withdrawn the model from production.

We recommend you to stay on quality analogues from proven brands. Pay attention to the following points when buying:

• 📦 Protection controller (must be included or soldered into the battery).
• 🔋 Capacity Marking: Do not take batteries with the declared 4000+ mAh is a hoax.
• 📅 Date of production: optimally - no older than 6 months (indicated on the label).
• 🛡️ Guarantee: Reliable sellers give at least 3 months.

Where to buy:

• 🌍 AliExpress – Cheaper but Long Shipping (Look for sellers rated 98%+).
• 🏬 Local service centers are more expensive, but you can check the battery before buying.
• 🛒 Parts stores (e.g. Chip & Deep, Amperka) – average prices, fast delivery.

3. Tools and training required

To replace the battery with Xiaomi Mi 5, you will need:

Torx T3 screwdriver (for back cover screws)

Plastic mediator or guitar mediator (to separate the body)

Screen suction cup (optional, but simplifies the task)

Tweezers (for working with plumes)

Dryer or thermo-air station (for softening the glue)

Isopropyl alcohol (for cleaning contacts)

New battery with double-sided tape (usually included)

Multimeter (to check the voltage, optionally)-->

Also prepare the workplace:

• 🪑 Work at a table with good lighting (better to use a desk lamp).
• 🧲 Remove metal objects – they can close contacts on the board.
• 📱 Take photos of each stage of dismantling (in useful during assembly).
• 🔋 Charge the new battery before 30-50% before installation (if not charged).

Important: Before starting work, turn off your smartphone and remove it SIM-If the battery is swollen, disassemble it with protective glasses, which can emit a caustic smoke if damaged.

⚠️ Warning: Do not use metal mediators to disengage the body! They can scratch the frame and damage the antenna contacts around the perimeter of the smartphone.

4. Step-by-step instructions for replacing the battery

Disassembly of Xiaomi Mi 5 requires care, especially at the stage of disconnecting the plumes.

Step 1: Removing the back cover

1. Heat the back cover around the perimeter with a hair dryer (60-70°C, no higher!) and this will soften the glue.
2. Insert the plastic mediator into the gap between the lid and the frame (start at the bottom corner where the charging connector is).
3. Carefully drive the mediator along the body, separating the lid. Don't force it -- if it's tight, warm up again with a hair dryer.

Step 2: Shutting off the battery

1. Unscrew 8 Torx T3 screws, fixing the metal plate above the battery.
2. Remove the plate and disconnect the battery connector (white, located at the top). Use plastic tweezers!
3. Don't pull the wires, just the connector! Damage to the plume can disable the power controller.

Step 3: Remove the old battery

1. Put a plastic blade on the battery from any angle. If it's glued heavily, warm up with a hair dryer (don't overheat!).
2. Take the battery out carefully, don't rot it. If it's swelling, don't puncture it, it's dangerous!
3. Clean the seat from the residues of glue with isopropyl alcohol.

Step 4: Installation of a new battery

1. Remove the protective film from the new battery and glue it to the old one (use double-sided tape from the kit).
2. Connect the battery connector to the board. Make sure it sits before the click.
3. Twisting the metal plate and check if the battery is skewed.

Step 5: Assembly and inspection

1. Place the back cover in place, starting with the charging connector. Press it around the perimeter.
2. Turn on your smartphone and check it out: 🔋 Charge indication (should show the real percentage). 📶 Network and Wi-Fi (Antenna contacts must not be damaged). 🔓 Fingerprint scanner (if it stops working, check the plume).

5. Calibration of the new battery

After replacing the battery, it needs to be calibrated to correctly display the percentage of charge.

1. Full discharge: Use the Mi 5 before automatically shutting down (do not recharge!).
2. Full Charging: Connect the original RAM and charge up to 100% without interruptions (preferably off).
3. Repeat the cycle 2-3 times, and then the percentage of charge will be displayed more accurately.

Frequently Asked Questions (FAQ)