Replacement of the battery on Xiaomi Redmi Note 3 Pro: a complete guide with photos and videos

Xiaomi Redmi Note 3 Pro

Redmi Note 3 Pro

Many users are afraid to disassemble their smartphone for fear of damaging plumes or losing water resistance. But in practice, replacing the battery on this model is a task of medium complexity that even a beginner can cope with with with the right preparation. In this article, you will find a step-by-step photo instruction, a list of necessary tools, tips for choosing a quality battery and answers to frequent questions.

Before you start disassembling, it is important to understand: Redmi Note 3 Pro has two modifications - with a Snapdragon 650 processor (global version) and with Helio X20 (Chinese version of Redmi Note 3). The batteries for them are interchangeable, but differ in marking. It is also worth considering that after replacing the battery, the smartphone may show an incorrect charge level - this is normal and corrects calibration.

Signs that the battery needs to be replaced

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

• 🔋 The smartphone is running out of power. 2-3 hours with moderate use (social networks, messengers).
• 📉 The percentage of charge “jumps” (for example, from 40% immediately drops to 15%).
• 🔌 The device is switched off when 20-30% charge and only activated after connection to charging.
• 📱 The body swelled (see the gap between the screen and the frame or the “hump” on the back cover).
• ⚡ The charge is extremely slow or stops at 80-90%.
• 🔥 The phone overheats during charging or work.

If at least 2-3 The list of items about your Redmi Note 3 The Pro is probably worn out, and you can check it with apps like AccuBattery or something like that. AIDA64. In these, look at the parameters Health and Capacity, if the actual capacity is smaller. 60% factory-wise (3000 mAh for Note 3 Pro), the battery to be replaced.

Note that sometimes similar symptoms cause software failures (for example, after a MIUI update) or a faulty charger. Before replacing the battery, try resetting to factory settings (Settings → Additional → Recovery and Reset) and testing another power supply.

What tools will be needed to replace

To disassemble the Xiaomi Redmi Note 3 Pro and replace the battery, you will need a minimum set of tools, most of which can be found in smartphone remakes (cost from 300 to 800 rubles) or buy separately.

• 🔧 Plastic mediators (2-3 (a) - for the careful liding and disconnection of the plumes.
• ⚡ Screwdriver cross (PH00) — hull-rotor.
• 🔥 Dryer or thermo-air station - to soften the glue under the battery.
• 🧲 Suction - will help remove the back cover (optional).
• 📏 Plastic blade - for tweaking the battery.
• 🔌 Tweezers – to work with small details.
• 🧴 Isopropyl alcohol (90%+) — glue-residue.
• 🔋 New battery – original or quality analogue (more on this below).

If you don't have a hair dryer, you can do with a needle and thread (a method of "pulling" the battery), but it's risky - you can damage the battery, you can also use an antistatic bracelet or at least a ground metal surface to avoid static discharge.

⚠️ Warning: Never use metal tools (knives, screwdrivers) to tweak the battery! The risk of short circuit and fire is extremely high. Plastic mediators are your main assistant.

How to choose a high-quality battery for Redmi Note 3 Pro

The choice of battery will determine how long your smartphone will last after you replace it, and there are many fakes on the market that not only fail quickly, but can also damage the device.

1. Original vs analogue. Official battery from Xiaomi is expensive (1500-2500 rubles.), but guarantees compatibility and safety. Quality analogues (for example, from Patona, Remax) will cost 800-1200 rubles. Avoid "no-name" batteries for 300-500 rubles. - They often have understated capacity and poor controller board.

Marking: The original battery shall bear the inscription:

Xiaomi


BM43




3860mAh (or 3000mAh for some games)




Made in China

Fakes often have typos or fuzzy font.

3. Capacity. The factory capacity is 3,000 mAh (despite the labeling 3,860 mAh on some batteries, it's a marketing ploy). If the seller specifies 4,000+ mAh, it's a hoax.

4. Charge controller. The original one has a soldered battery and has overheat/recharge protection. Cheap counterparts often lack or are of poor quality.

• 🔍 Where to buy: Official Xiaomi stores, verified sellers on AliExpress (rating 98%+), «The Connection, MVideo».
• 🚫 What to avoid: Batteries without packaging, with damaged contacts, labeled "Ultra Capacity" or "Premium».
• 📦 Package: The box should have the battery itself, protective film on the contacts and instructions (for the original).

⚠️ Note: If you buy a battery on AliExpress, pay attention to the reviews from the photo! Fraudsters often send empty boxes or fakes. Order only from sellers with a guarantee of returns.

Step-by-step instructions for replacing the battery

Now, to the most critical stage, disassembling your smartphone and installing a new battery, follow the instructions carefully so that you do not damage the plumes or contacts.

Turn off your smartphone and remove it. SIM-map|Remove the back cover (carefully, without jerks)|Unscrew all the screws and fold them separately.|Disconnect the battery plume first.|Don’t pull the plumes – just the connectors.-->

Step 1. Disconnect and disassemble the body

Turn off the Redmi Note 3 Pro and remove the tray for SIM-Next, you have to take the back cover off, and it's attached to the latches and glue, so you have to be careful:

1. Heat the edge of the body with a hair dryer (temperature ~60 ° C) for 1-2 minutes.
2. Insert a plastic mediator into the gap between the lid and the case (start at the bottom edge where the charging connector is).
3. Carefully drive the mediator around the perimeter, snapping the clamps.

If the lid does not lend itself, do not apply force - once again warm up the dryer problem areas.

Step 2. Shutting off the battery

When you take the lid off, you'll see a battery with a black film, and the first thing you do is unplug its plume (it's under a little lid that you need to tap into with a mediator), and use a plastic spatula to keep the contacts in check.

Step 3: Remove the old battery

The battery is glued to the body to remove it.

1. Warm up the surface of the battery with a dryer (do not overheat - maximum 70 ° C!).
2. Put a plastic blade on the edge of the battery and pull it up, and if it doesn't, put the isopropyl alcohol under the battery, and it will dissolve the glue.
3. Take your time! The battery must be moving evenly, without jerking.

Step 4: Installation of a new battery

Before installing the new battery, clean the case of glue residues with alcohol.

1. Stick bilateral tape (comes complete with the battery) to the bottom of the case.
2. Carefully put the new battery in, combining the contacts.
3. Connect the battery plume and check if the battery is held firmly.

Step 5: Build a smartphone

Make sure all the plumes are connected, and swivel the screws back. Click the back cover starting at the top edge. Turn on your smartphone and check the charge level.

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If the battery is discharged too quickly after replacing, perform a calibration: completely discharge the smartphone before turning off, then charge to 100% without interruptions. Repeat the procedure 2-3 times.

What to do if the battery does not work after replacement

Sometimes, after installing a new battery, problems arise: the smartphone does not turn on, does not charge or shows the wrong percentage of charge.

• 🔌 It doesn't turn on: Check if the battery plume is tightly connected. If the contacts are oxidized, clean them with alcohol.
• 📉 Incorrect charge (0% or 100%): Calibration (see tip above) or resetting via Recovery is required.
• 🔥 Overheating: The new battery may be poor quality or damaged by the motherboard’s charge controller.
• ⚡ No charging: Check the charging port for debris. Try another charger.

If the smartphone does not respond to charging at all, the reason may be in the charge chip (for example, BQ24193), in which case you will need to diagnose in the service center.

Another common problem is that a new battery will blow up in a few months, which is a sign of a defective battery or a poor-quality battery, so you can contact the warranty vendor right away.

⚠️ Warning: If after the battery change, the smartphone starts spontaneously restarting, this may indicate a short circuit!

How much does it cost to replace a battery in a service center?

If you are not sure of your abilities, you can contact the service.The cost of replacing the battery with the Xiaomi Redmi Note 3 Pro varies depending on the region and type of battery:

Official service gives a guarantee for work (usually 3-6 months), but also costs more. informal workshops can use non-original parts, so check in advance what battery will be installed.

Self-replacement is the cheapest, but it requires care. If you've never disassembled a smartphone, you'd better practice on an old device or watch YouTube video tutorials (like the Repair Universe channel).

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Savings on battery replacement can be even more costly if you damage the plumes or the motherboard.

How to prolong the life of a new battery

To keep your new battery lasting as long as possible, follow these guidelines:

• 🔋 Avoid full discharge. Optimal charge range — 20-80%. Regular discharges to 0% shorten service.
• ⚡ Use the original RAM. Quick Charge speeds up battery wear. If possible, charge from the standard unit. 5V/2A.
• 🌡️ Don't overheat your smartphone. Don't leave it in the sun or near heat sources. Optimum temperature — 10-35°C.
• 📵 Disable unnecessary functions. GPS, Bluetooth, mobile data in the background is using up charge. MIUI.
• 🔄 Calibrate the battery once a time. 2-3 Fully discharge and charge the smartphone for resetting the controller.

It’s also worth turning off MIUI optimization for the battery, as it often doesn’t work properly. Go to Settings → Battery → Settings → Disable MIUI optimization.

If you use your smartphone intensively (games, videos), consider buying a powerbank or battery case.

FAQ: Frequent questions about battery replacement