What battery is in Xiaomi Redmi Note 5: specifications and recommendations for replacement

The Xiaomi Redmi Note 5 is one of the most popular smartphones of 2018, and is still in use today for its balanced performance and reliability. However, over time, even the best equipment requires maintenance, and the battery is the first part that fails. If your Redmi Note 5 quickly discharges, spontaneously turns off or overheats, the problem is likely to lie in the battery.

In this article, we will discuss in detail what battery is installed in the Xiaomi Redmi Note 5 from the factory, how to check its condition, what analogues are suitable for replacement, and whether it is possible to extend the life of the battery without replacing it, and how to distinguish the original part from a fake and avoid the typical mistakes when self-repairing.

Technical characteristics of the original battery Redmi Note 5

Smartphone Xiaomi Redmi Note 5 (codenamed whyred) is equipped with a non-removable lithium-polymer (Li-Po) battery with the following parameters:

• 🔋 Capacity: 4000 mAh (nominal) / 3900 mAh (real, with charge control in mind).
• 🔌 Voltage: 3.85 V (typical), 4.4 V (maximum).
• 📏 Sizes: ~152 × 73 × 4 mm (exact dimensions depend on lot).
• 🔗 Connector: standard JST 1.0 (2 power contacts) + thermistor).
• 🏭 Manufacturer: Original batteries supplied ATL (Amperex Technology Limited and SDI (Samsung SDI).

It's important to understand that the rated capacity of 4,000 mAh is a marketing value. The actual capacity you'll see in diagnostic utilities like AccuBattery is typically 3,700-3,900 mAh because of Xiaomi's charge control features. That's fine and doesn't mean it's malfunctioning.

The battery in the Redmi Note 5 is integrated into the body and glued to the back cover with double-sided tape, which requires heating the glue (such as a hair dryer) and gently tampering with a plastic spatula. Do not use metal tools - the risk of puncture and fire!

How to check the status of the battery without disassembling the phone

Before deciding to replace, it is worth assessing the current state of the battery, and here are some ways to do so without opening the case:

1. Visual signs of wear and tear: 🔥 Phone overheats when charging or under load (games, video). ⚡ Battery discharges in 2-3 hours with moderate use. 🔄 Smartphone spontaneously turns off at 20-30% charge. 🛑 Charging is stuck by 80-90% and does not reach 100%.
2. Software Diagnostics: Use applications like AccuBattery (Android) or ##4636## (engineering menu). In Battery information, look at Battery health. In AccuBattery, check the actual capacity chart — if it falls below 60% of its face value, it's time to change the battery.

If you see the status of "Unknown" or "Bad" in the engineering menu (#4636###) opposite Battery health, that's a direct signal to replace. Also note the internal resistance of the battery - if it exceeds 200 mOhms, the capacity has dropped critically.

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If the phone turns off at 15-20% charge, but after restarting shows 0%, the problem is not the battery, but the power controller (the chip on the board), in which case replacing the battery will not help - you need to repair the motherboard.

Original vs analogues: which battery to choose for replacement

When replacing the battery in the Redmi Note 5, you have three options:

For the Redmi Note 5 Best choice - original battery Xiaomi (article: MBJ405630) analogue ATL/SDI containerly 4000 From proven brands can be recommended:

• 🔋 ATL (Amperex – supplier of original batteries for Xiaomi.
• 🔋 SDI (Samsung – High quality, but less common on sale.
• 🔋 Desay – Chinese manufacturer, supplying components for Xiaomi.

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Never buy no-name batteries from brands (like Generic or For Xiaomi) – they often have understated capacity and can damage your phone.

When buying, pay attention to:

• 📦 Packaging: Xiaomi’s original batteries come in a white box with a hologram and a sleek look. QR-code.
• 🏷️ Labeling: The battery must indicate the capacity, voltage, production date and logo of the manufacturer.
• 🔍 Appearance: contacts should be clean, without oxidation; body - without bloating.

Step-by-step instructions for replacing the battery with your own hands

If you decide to replace the battery yourself, follow this instruction.Warning: wrong actions can damage the phone or cause fire!

Turn off the phone and remove it. SIM-map|Prepare the workplace (clean surface, good lighting)|The purchased battery should be charged at 30-50%|At hand should be tools: plastic shoulder blades, hair dryer, tweezers, glue B-7000|Make a backup copy of the data (in case of emergency situations)-->

Tools required:

• 🔧 Plastic blades (mediators) for opening the body.
• 🔥 Building hair dryer (or powerful household) for heating glue.
• 🧲 Magnetic screwdriver (cross, size) PH00).
• 🧴 Clay. B-7000 or double-sided tape to fix a new battery.
• 🔋 Multimeter (optional, to check the voltage).

Step 1: Disassembling the phone

1. Turn off the Redmi Note 5 and remove the tray for the SIM-map.
2. Heat the hair dryer around the perimeter (temperature ~60–70°C) for 2-3 minutes.
3. Carefully tuck the lid with a plastic spatula, starting at the bottom edge (where the charging connector is).
4. Unscrew 12 screws that fix the metal plate over the battery.

Step 2: Remove the old battery

1. Disconnect the battery plume from the motherboard (use a plastic spatula!).
2. Heat the battery with a hairdryer (no higher than 80°C!) and carefully pull the special tongues (if any).
3. If there are no tongues, dent the battery with a spatula, putting a thin plastic card under it.
4. Don't make an effort! If the battery doesn't respond, heat the glue again.

Step 3: Installation of a new battery

1. Remove the remnants of old glue from the case (you can use isopropyl alcohol).
2. Stick the new battery onto a double-sided scotch or apply a thin layer of B-7000 glue.
3. Connect the power plume to the motherboard.
4. Make sure the battery is flat and does not press on other components.

Step 4: Assembly of the phone

1. Twisting all the screws of the metal plate.
2. Stick the back cover (use the original glue or B-7000).
3. Charge your phone to 100% and calibrate the battery (discharge to 0% and charge without interruptions).

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After replacing the battery, reset the battery statistics in the engineering menu (#4636## → Battery information → Reset stats) to help the system correctly display the charge level.

Common Mistakes When Replacing a Battery and How to Avoid Them

Even experienced users sometimes make mistakes that can make your phone down, and here are the most common ones:

⚠️ Attention! If you see that the battery plume is oxidized or damaged when you disassemble the phone, don't plug in the new battery -- check the voltage on the contacts with a multimeter first!

• 🔥 Battery overheating with a hairdryer: If the battery is heated above 80°C, it can swell or even ignite. Use a dryer at minimum power and keep it at a distance of 5-10 cm.
• 🛠️ Use of metal tools: A metal screwdriver or spatula can puncture the battery. Always use plastic or wooden tools.
• 🔌 Incorrect plume connection: If you confuse polarity or don't fully insert the connector, the phone may not turn on.
• 📉 Ignoring calibration: After replacing the battery, it must be completely discharged and charged 2-3 times in a row.

Another common problem is the new battery's bad fixation, which, if it's not glued properly, can eventually move and damage the plume or other components, and use a thin layer of B-7000 glue or a special double-sided battery tape.

How to extend the life of the Redmi Note 5 battery without replacement

If the battery has not yet completely failed, but has already begun to lose capacity, you can try to extend its life with a few simple rules:

• 🔌 Charging: ⚡ Avoid deep discharge (below). 10%) and recharge (above) 90%). 🔋 Use the original ZU (5V/2A) Certified (e.g. Anker, Baseus). 🌡️ Do not charge your phone at a lower temperature. 0°C or higher 40°C.
• 📵 Exploitation: 🎮 Close the background apps and games if you don’t use them. 📶 Turn it off. 4G/LTE, Wi-Fi and GPS, when they're not needed. 🌙 Use a dark theme (AMOLED-screens in the Redmi Note 5 No, but it reduces the burden on GPU).
• ⚙️ Settings: 🔄 Turn on adaptive brightness and set a screen timeout for 15-30 seconds. 🔋 Turn off optimization. MIUI for the battery (Settings) → Battery. → Optimization). 📊 Check the charge consumption by application and limit the background activity of "gluttonous" programs.

If the phone is not in use for a long time, store it with a charge of 40-60% in a cool place (but not in the refrigerator!). Full discharge or 100% charge with long storage accelerates battery degradation.

Where to buy a battery for Redmi Note 5 and how much it costs

The battery prices for the Xiaomi Redmi Note 5 vary depending on the type and seller.

When buying on AliExpress, pay attention to the seller's rating (at least 97%) and the number of orders. Good reviews are when customers attach photos of packages and capacity tests. Avoid sellers with suspiciously low prices (below 800). ₽) — Most likely, it is a fake with a capacity of 2000-2500 mAh.

⚠️ If you buy a battery in a market or in a small store, ask the seller to demonstrate a capacity test using the battery. USB-This will avoid cheating with low capacity.

Frequently Asked Questions (FAQ)