How to know exactly what battery is in Xiaomi Redmi Note 4: a guide with photos and tables

Owners of Xiaomi Redmi Note 4 (codenamed mido) sooner or later face the need to replace the battery. But how to know which battery is installed in the device? Original or already replaced? With a capacity of 4100 mAh or reduced after many years of use? This article will help to understand the issue without disassembling the smartphone — using software methods, visual markers and technical documentation.

We analyzed all the possible ways, from hidden MIUI menus to hardware tests, and collected data on compatible battery models from Xiaomi and third-party manufacturers, and paid special attention to the nuances that are often overlooked in standard instructions - for example, how to distinguish a fake by a serial number or why the rated capacity may not match the real one. If you are planning to replace the battery or just want to check its condition, this article will become your guide.

1. Check through hidden engineering menu (code ##4636##)

The fastest way to get battery data is to use the Android hidden menu, which is available on all Xiaomi smartphones, including the Redmi Note 4, but requires care: not all settings here are intuitive.

Instructions:

• 📱 Open the phone app and enter the combination: ##4636##.
• 🔍 In the menu that appears, select Battery Information).
• 📊 Note the lines: Level – current percentage; Health – if Good is indicated, battery is normal; Technology – usually Li-ion or Li-poly; Temperature – in degrees Celsius, divided by 10 (for example, 285 = 28.5°C).

Unfortunately, this menu doesn't show the battery model or its serial number, but it does show the actual battery status by Health -- if you're saying Unknown or Dead, it's a signal for an emergency replacement. It's also useful to compare Temperature to Normal: Redmi Note 4 has an optimal charging range of 25 to 40°C.

Data in MIUI settings: where to look for technical information

MIUI hides some of the battery data in standard settings, but it can be extracted with additional manipulations, a method that does not require root rights and works on any version of firmware.

Step-by-step:

1. Go to Settings. → The phone.
2. Tap 5-7 times on the line MIUI version until the notification appears You became a developer!
3. Go back to the main Settings menu and open a new section for developers.
4. Scroll down to the Debugging block and turn on the Debugging over USB.
5. Connect your phone to your PC and use the adb shell dumpsys battery command (requires an ADB installed).

In the conclusion of the team, pay attention to:

• 🔋 Present: True - Battery connected;
• 📏 Capacity: X is the current capacity in percentage;
• 🔢 Voltage: X - voltage (normal for Redmi Note 4: 3.7-4.4 V);
• 🆔 Technology: Li-ion - Type of battery.

⚠️ Note: If the adb shell dumpsys battery output does not have a serial number, your battery is either unoriginal or the firmware is modified, in which case a physical examination will be required to accurately identify the battery.

3. Visual Identification: What the Original Battery Looks Like

If you're ready to disassemble the phone (or have already done so), look for the battery markings. The original batteries for the Redmi Note 4 have clear distinguishing features:

📸 Photo for comparison: The original battery is necessarily present:

• 🏷️ Inscription Made in China by ATL (Manufacturer of Amperex Technology Limited);
• 🔍 Microscopic Mi logo on hologram;
• 📅 Date of production in format YY-MM-DD (for example, 17-05-15 may 2017 year-end).

⚠️ Note: If the battery is marked with 4000 mAh but is identical in appearance to the original, it may be a "relabeled" version from the Redmi Note 3 (model kenzo), which is physically compatible but has lower capacity and can cause problems calibrating the charge.

4. Diagnostic applications: AccuBattery, CPU-Z and others

Third-party utilities allow you to get advanced information about the battery without disassembling the phone. We tested 5 popular applications and selected the most accurate for the Redmi Note 4.

Top.-3 annex:

• 📊 AccuBattery: Shows real capacity (e.g. 3,500 mAh instead of the stated 4100); Tracks battery health as a percentage; Records real-time temperature and voltage.
• 🔧 CPU-Z: Battery tab shows Level, Voltage, Temperature; displays Technology (Li-ion/Poly); Disadvantage: Does not show the serial number or model.
• 🔋 AIDA64: Most detailed application (even shows Manufacturer); In Battery section, look for Serial number; Can determine Production Date (if supported).

📌 Tip: For maximum accuracy, use AccuBattery paired with AIDA64. The first appendix will give you the status data, the second will give you the technical details. AIDA64 Samsung manufacturer SDI, a on the battery label — ATL, It's 100% fake.

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Before installing diagnostic applications, turn off battery optimization for them in the MIUI settings (Settings → Applications → Permissions → Auto Run).

5. Compatible battery models for Redmi Note 4: table of analogues

If you are planning a replacement, it is important to know which batteries are suitable for the Redmi Note 4 (mido).

⚠️ Note: When buying a similar, pay attention to the thickness of the battery. 152.5 × 76.5 × 3.85 Mmm. Batteries are thicker. 4 mm may not fit into the body or deform the screen when assembled.

🔍 How to verify authenticity when buying:

• 🛒 Buy only from official Xiaomi partners (list on mi.com);
• 🔎 Check the hologram on the package under the UV lamp - the original glows green;
• 📦 It should be on the box. QR-code that leads to the Xiaomi page;
• 💰 The price of the original battery is from 1500 to 2500 rubles. Cheaper? Most likely, a fake.

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The only way to guarantee the original battery is to order it through an authorized Xiaomi service center with a serial number check.

6. Hardware diagnostics: multimeter and capacity tester

For the most meticulous users who want 100% accurate data, a hardware verification method is fine, requiring disassembly of the phone and basic electronics skills, but yielding objective results.

What you need:

• 🔧 Multimeter (e.g., multimeter, DT-830B);
• 🔋 USB-Tester (e.g. Xiaomi) ZMI);
• 🛠️ Plastic mediator for disassembly;
• 🔥 Fryer (for softening glue).

Step-by-step:

1. Turn off the phone and remove the back cover (gently tucking in the mediator).
2. Disconnect the battery plume from the motherboard.
3. Connect the multimeter to the battery contacts in voltage measurement mode (20V DC).
4. Compare the readings: 3.7-4.2 V is normal; below 3.5 V is a deep discharge, charging is required; above 4.3 V is overcharging, dangerous!

Use the container to check the capacity USB-Tester: discharge the battery to 0%, then charge to 100% and fix the value in mAh.

📌 Example of calculation: If USB-The tester showed that the battery included 3200 mAh instead of the declared 4100 mAh, its wear is ~22%. This is a critical replacement rate.

Frequent errors in determining the battery model

Many users make the same mistakes when trying to identify the battery in the Redmi Note 4, and we’ve collected the most common ones so you can avoid them:

• 🔄 The Redmi Note 3 battery (kenzo, 4,000 mAh) looks similar but has a different connector. It can be inserted into the Note 4, but the phone won't charge.
• 📏 Ignoring thickness: Batteries thicker than 4 mm can damage touchscreen when assembled.
• 🔋 The 4100 mAh label on a non-original battery does not guarantee real capacity.
• 🔌 Don’t check contacts: Oxidized or bent battery contacts can cause charging errors even if the battery itself is in good working order.
• 📱 Resetting to factory settings does not affect battery data, but some “masters” advise this as a solution to charge problems.

🔍 How to avoid mistakes:

1. Always check the battery serial number with Xiaomi’s database (you can use the Mi Verify app).
2. Before buying a similar, check out the reviews on a particular model on forums (e.g. 4PDA or Mi Community).
3. If the phone doesn’t turn on after replacing the battery, check the polarity of the plume connection.

FAQ: Answers to Frequent Questions