Replacement of the battery on Xiaomi Redmi Note 5A: a complete guide with photos and tips

Xiaomi Redmi Note 5A

2017

Many users are afraid to disassemble their smartphone for fear of damaging the plumes or display. However, with the right approach and a minimum set of tools, the procedure takes no more than 30-40 minutes. In this article, we will discuss in detail how to change the battery to the Redmi Note 5A at home, avoiding typical errors. You will learn what tool you need, how to safely disconnect the plumes and what to do if the new battery is not recognized by the system.

Important: If your smartphone is still warranty, replacing the battery will cancel it, in which case you should contact an authorized Xiaomi service center.

Signs of battery wear on the Redmi Note 5A

How do you know if your Redmi Note 5A battery needs to be replaced?Here are the key symptoms that aren't due to software glitches or viruses:

• 🔋 The phone's emptying on 50% more 2-3 hours with moderate use (social networks, messengers).
• 🔌 Charging is extremely slow or interrupted (for example, with the 80% before 100% walking 1-2 hour).
• 📉 The percentage of charge “jumps”: just was 30%, and a second later – 15%.
• 🔥 The case of the smartphone is noticeably heated in the battery area even without loading.
• ⚡ The phone turns off when 20-40% although it had previously been used before 5-10%.

If you know at least 2-3 items on the list, the battery is worn out by 70-80% and needs to be replaced. You can check the exact capacity using applications like AccuBattery (available on Google Play). Note: if the phone suddenly turns off at 0%, but after charging it shows 10-15%, this is already critical wear.

Tip: Before replacing the battery, reset the battery statistics in the settings (Settings → Battery → Three dots (menu) → Reset battery statistics).

What battery to choose for Redmi Note 5A

The original battery for the Redmi Note 5A has the following characteristics:

• 🔋 Model: BM44 (or DM44 for some modifications).
• 📏 Capacity: 3080 mAh (nominal), 3150 mAh (typical).
• 🔌 Voltage: 3.85 V.
• 🔧 Type: Li-Polymer (lithium polymer).

There are three battery options on the market:

1. Original (OEM) — They are manufactured in the same factories as Xiaomi, but sold without a logo: 1200-1800 ₽. Guarantee — 6-12 months.
2. Premium analogues (e.g. Camelion, Patriot: 800-1200 ₽. The quality is close to the original, but the capacity can be underestimated by 5-10%.
3. Budget analogues (no-name). 400-700 ₽, but often have a capacity 2500-2800 mAh instead of the stated 3080 mAh. Term of service — 6-12 months.

⚠️ Warning: Buy the battery only from trusted sellers (e.g. AliExpress rated 98%+, Beru, Yandex Market, fakes from the original can swell or ignite when charging!

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Check before buying whether the new battery supports fast charging (if your Redmi Note 5A supports it).

Battery replacement tools

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

• 🔧 Plastic blades (2-3 (a) - for the careful smearing of the hull and the disconnection of the plumes.
• ⚙️ Cross screwdriver (size) PH00 or PH0) — screw-off.
• 🔥 Dryer or thermo-air station - to soften the glue under the battery.
• 🧲 Suction (optional) - helps to raise the screen after heating.
• 📦 Tweezers – to work with small details.
• 🧴 Isopropyl alcohol (90%+) — glue-residue.
• 🔋 New battery with double-sided tape (usually included).

If you do not have a hair dryer, you can use a regular household, but be careful: do not direct hot air to the display for longer than 10-15 seconds in one approach. The optimal heating temperature is 60-70 ° C (to touch the body should be tolerated by hand).

⚠️ Warning: Do not use metal blades or knives - they can damage plumes or puncture the battery! Lithium polymer batteries can ignite or explode if damaged.

Step-by-step instructions for replacing the battery

Now, to the process itself, follow the instructions carefully so that you don't damage your smartphone.

Step 1. Disconnect and disassemble the body

1. Turn off the Redmi Note. 5A and remove the tray for SIM-map.
2. Heat the hair dryer around the perimeter for 1-2 minutes. The glue will become softer, and the cover will be removed more easily.
3. Insert a plastic blade into the gap between the body and the screen (start at the bottom edge) and gently tuck the lid in. If it doesn't lend itself, warm up for another 30 seconds.

Step 2: Spinning the screws

• Once the lid is removed, you will see 10 screws (the size of PH00) unscrew them all and fold them in a separate place (for example, on a magnetic substrate).
• Note: screws near the camera and the charging connector can be of different lengths - do not confuse them when assembled!

Step 3: Disconnect the plumes

• Carefully disconnect the battery plume (it is under a black insulation tape) and use a plastic blade to plug the connector.
• Disconnect the display and touch panel plumes (they are located at the top of the board).

Step 4: Remove the old battery

• Put a plastic blade on the battery, and if it's glued hard, warm it up with a hair dryer on the back. 10-15 seconds.
• Don't pull the battery by the wires, it's attached to double-sided tape, and you can peel it evenly from different sides.
• After extraction, remove the residues of the glue from the body using isopropyl alcohol.

Step 5: Installation of a new battery

• Remove the protective film from the new battery and glue it to the old one, make sure the contacts match the connector on the board.
• Connect the battery plume to the motherboard. It should snap with a click.

Step 6: Assembly of the phone

• Connect the display and sensor plumes in reverse order.
• So, turn all the stains (not to be worn).
• Stick the back cover. You can use 3M double-sided tape or B-7000 glue for reliability.

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If the phone doesn't turn on after assembly, check the battery plume and display connection. 90% of the time, the problem is in the inconsistency of contact.

What to do if the new battery is not working

Sometimes, after a battery change, the Redmi Note 5A does not behave correctly: it does not charge, quickly discharges or is not recognized by the system.

• 🔌 Phone won't turn on: Check if the battery plume is tightly connected. Connect the charger and hold it. 5-10 Sometimes a new battery needs time to wake up. If it doesn't work, try connecting the phone to a PC, and it might be determined by charging.
• 📉 Fast discharge: Reset battery statistics (Settings) → Battery → Menus. → Resetting statistics. 2-3 full charge/discharge cycle (from 0% before 100%). Check if your phone is warming up – if so, maybe your battery is broken.
• ⚡ No charge: Clean the dust charger (use a toothpick or compressed air). Try another charger and cable. If the battery swells after a few days, it's a defect, request a replacement under warranty.

⚠️ Warning: If the new battery is heated above 40°C when charging or using, immediately turn off the phone! this is a sign of a malfunction that could lead to a fire.

Calibration of the new battery

To make the new battery work as efficiently as possible, you need to run it right.

1. First charge: charge your phone to 100% and hold on charging for another 1-2 hours.
2. First category: Use your phone until it's completely turned off (0%). Do not plug in the charger until it turns off itself.
3. Repeat cycles: Repeat the charging/discharge procedure 2-3 times to help the battery controller determine the level of charge more accurately.
4. Use: Avoid frequent recharging (e.g. 20% to 80%) and charge your phone 10% to 100% every 1-2 days.

After calibration, the autonomy of the Redmi Note 5A should return to factory performance:

• 📱 Standby mode: 2-3 day-day.
• 🎮 When used actively (social networks, video): 8-12 hours.
• 📞 Conversations: 10-15 hours.

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Turn off the background activity of the applications (Settings → Battery → Battery Optimization) to extend the life of the new battery.

Frequent errors when replacing the battery

Even experienced users sometimes make mistakes that cause their phone to break, and this is what you can't do when you replace your battery with a Redmi Note 5A:

• 🔧 Use metal tools – they can close contacts on the board or puncture the battery.
• 🔥 Overheat the body – if the hair dryer is too hot, you can melt plastic parts or damage the display.
• 🧲 Use force when you disconnect the plumes, they're fragile and they break easily.
• 🔋 Install the battery with another capacity - this can lead to overheating or bloating.
• 📱 Turn on the phone without a connected display - the risk of damage to the plume of the touchscreen.

If you damage the display or sensor plume, the phone may:

• Don't react to touch.
• Show artifacts on the screen (strips, flickering).
• Not included at all (if the motherboard is damaged).

In such cases, a replacement of the plume (cost) will be required — 800-1500 ₽) or diagnostics at a service center.

FAQ: Answers to Frequent Questions