Replacing the battery on Redmi Note 10S: a detailed guide with photos and nuances

Xiaomi Redmi Note 10S is one of the most popular smartphones in the budget segment, but even it is not immune to battery wear. After 2–3 years of active use, the battery capacity may drop by 30–50%, and the phone will begin to discharge within a few hours. The service center will charge from 1,500 to 3,000 rubles for a replacement, but if you wish, you can carry out the procedure yourself - the main thing is to know the nuances.

In this article you will find step-by-step instructions for replacing the battery with photos, recommendations for choosing an original or analog battery, as well as tips for calibrating and extending the service life of a new battery. We will also look into common mistakes, which can lead to damage to the smartphone, and we will provide answers to frequently asked questions from users.

Signs of battery wear on Redmi Note 10S

How to understand that the battery Redmi Note 10S needs replacement? Here are the key symptoms:

• 🔋 The phone discharges in 3-4 hours with moderate use (social networks, instant messengers, calls).
• 📉 In the battery settings (Settings → Battery → Battery status) capacity shows less than 80% of the original (original capacity - 5,000 mAh).
• ⚡ The smartphone suddenly turns off at 20–30% charge, although the indicator shows the remaining charge.
• 🔥 The case heats up noticeably in the battery area even under light load.
• 🐢Charging takes more than 3 hours (using original 33W charger).

If at least 2-3 items from the list match your situation, most likely the battery has degraded. Check its status through the application AccuBattery (available in Google Play) - it will show the actual capacity and wear level as a percentage.

⚠️ Attention: If the phone is swollen in the battery area (there is a noticeable discrepancy between the screen and the body), turn it off immediately and don't try to charge! A swollen battery may catch fire.

Which battery to choose for replacement

Original battery for Redmi Note 10S is marked BM4X and nominal capacity 5,000 mAh. However, there are many analogues on the market, and not all of them are of equal quality. Let's consider the options:

Battery type	Manufacturer	Capacity	Pros	Cons	Price (2026)
Original	Xiaomi (article BM4X)	5,000 mAh	Guaranteed compatibility, long service life	High price, risk of running into a fake	2 000–2 500 ₽
Premium analogue	ZMI, Baseus	5,000–5,200 mAh	High-quality materials, characteristics close to the original	The price is almost the same as the original	1 500–2 000 ₽
Budget analogue	Unnamed Chinese brands	4,500–5,000 mAh	Low price	Risk of rapid wear, possible calibration problems	600–1 200 ₽

When purchasing, pay attention to:

• 📦 Packaging - original batteries Xiaomi supplied in a white box with a hologram and QR code.
• 🔍 Marking - the battery must have an article number BM4X, production date and rated voltage 3.85V.
• 🛡️ Guarantee — reliable sellers provide at least 6 months of warranty on analog batteries.

Important: Batteries with a capacity of more than 5,200 mAh may not display the charge level correctly in MIUI due to differences in the controller. If you want maximum compatibility, take the original or certified analogues from ZMI.

Required tools for replacement

To replace the battery yourself Redmi Note 10S you will need:

• 🔧 Plastic spatulas (2–3 pcs.) for carefully prying off the case.
• 🔨 Phillips screwdriver (size PH00) for rear cover screws.
• 🧲 Magnetic mat or a container for screws (so as not to lose small parts).
• 🔥 Hair dryer or hot air station (to soften the glue under the battery).
• 🩹 Alcohol wipes (to clean contacts and remove glue residues).
• 🔋 New battery (with tested capacity and controller).
• 📱 Sucker (optional for screen removal if required).

If you do not have experience disassembling smartphones, we recommend purchasing repair kit (costs about 500 ₽ per AliExpress or in computer stores). It already includes all the necessary tools.

⚠️ Attention: Do not use metal spatulas or knives to pry up the case - they can damage the cables or leave scratches on the frame!

Step-by-step instructions for replacing the battery

Disassembly Redmi Note 10S requires care, since the body is glued together and the cables are fragile. Follow the instructions:

Step 1: Removing the back cover

1. Turn off your phone and remove the SIM card tray.

2. Heat the edges of the back cover with a hairdryer (temperature ~60°C) for 1-2 minutes to soften the glue.

3. Using a plastic spatula, carefully pry up the bottom edge of the cover (from the connector side USB-C) and slowly move the tool along the body, separating the clips.

Step 2: Disabling loops

1. Unscrew the 10 screws securing the metal plate (they are of different lengths - remember the location!).

2. Remove the plate and disconnect the cables battery, display And cameras using a spatula. Don't pull the wires!

3. Peel off the protective film from the battery (if any).

Step 3: Removing the Old Battery

1. Use a plastic spatula to pry off the battery from either side and pull the special black tape (pull-tab). If it is not there, carefully pry off the battery around the edges.

2. If the battery is glued tightly, heat it with a hairdryer (no more than 70°C!) and use isopropyl alcohol to dissolve the glue.

3. Remove any remaining adhesive from the case with an alcohol wipe.

Step 4: Install a New Battery

1. Check the contacts of the new battery for dirt. If necessary, clean them with alcohol.

2. Apply double-sided tape (included with the battery) or apply new glue B-7000.

3. Connect the battery cable to the motherboard and carefully place it in place.

Step 5: Assembling the Phone

1. Connect all cables back (make sure they fit tightly into the connectors).

2. Tighten the screws of the metal plate (watch the length!).

3. Glue the back cover, starting from the top, and press firmly along the edges.

After assembly don't turn on your phone right away — let the glue set (10–15 minutes).

What to do if the phone does not turn on after replacement?

1. Check if the battery cable is tightly connected.

2. Make sure the contacts are not dirty (clean with alcohol).

3. Try charging your phone for 10-15 minutes, then turn it on.

4. If it doesn’t help, the display cable or motherboard may be damaged (diagnostics required).

Calibrating a new battery

After replacing the battery, you need to calibrateso that the charge controller correctly displays the charge level. Do this on the first day after installation:

1. 🔌 Charge your phone up to 100% (use original 33W charger).
2. 🕒 Keep charging for another 1–2 hours after reaching 100%.
3. 📵 Unplug charging and turn off your phone for 5 minutes.
4. 🔋 Turn on and discharge to 0% (until it turns off on its own).
5. 🔄 Repeat the charge-discharge cycle 2-3 times.

This procedure helps reset the old battery in the controller and “teach” the system to correctly recognize the new battery.

Common mistakes and how to avoid them

Even with careful replacement, you can make mistakes that will lead to a malfunction of the phone. Here are the most common of them:

• 🔧 Tightening the Screws - This may damage the motherboard. Tighten them with moderate force.
• 🔥 Battery overheating with hair dryer - If the temperature exceeds 80°C, the battery may swell. Keep the hairdryer at a distance of 10 cm.
• 📱 Damage to the display cable — if the screen does not work after assembly, check whether the cable is torn off when connecting.
• 🔋 Using an incompatible battery - for example, from Redmi Note 10 Pro. It may not fit correctly or may not work correctly with the controller.
• 🧲 Lost screws - the screws are of different lengths, and if you mix them up, you can damage the board.

If after replacement the phone starts get too hot, discharge quickly or don't hold chargeMost likely the problem is:

• Poor quality battery (check the capacity through AccuBattery).
• Poor contact of the cable (disassemble and check the connection).
• Damage to the charge controller (diagnostics required at the service center).

FAQ: Frequently asked questions about replacing the battery on Redmi Note 10S

Is it possible to replace the battery without a hair dryer?

Theoretically yes, but this will significantly complicate the process. The glue under the battery is very sticky, and without heating, the risk of damaging the cables or case increases. If you don't have a hairdryer, use isopropyl alcohol to dissolve the glue, but be prepared to spend more time.

How long will a new battery last?

The service life depends on the quality of the battery and operating conditions:

• Original battery - 2–3 years (500–800 charge cycles).
• Premium analogue (ZMI) — 1.5–2 years.
• Budget analogue - 6–12 months.

To prolong service life, avoid:

• Charge “up to 100%” every time (optimally keep the charge in the range of 20–80%).
• Using cheap chargers.
• Phone overheating (do not play heavy games while charging).

Do I need to glue a new battery?

Yes, definitely! Without fixation, the battery may move if dropped or vibrated, which will lead to a break in the cable. The original battery comes with double-sided tape - that's enough. If you buy an analogue, buy glue separately B-7000 or battery tape.

Is it possible to replace the battery without removing the screen?

Yes, in Redmi Note 10S The battery is located so that it can be removed without removing the display. However, if you damage the screen cable during disassembly, you will have to remove it for repair. Therefore, work carefully!

Where to buy an original battery for Redmi Note 10S?

Official batteries Xiaomi can be found:

• On AliExpress (stores with a rating above 98% and reviews of original parts).
• At branded service centers Xiaomi (sometimes they sell spare parts).
• In trusted Russian stores (for example, M.Video, Svyaznoy - but check availability before purchasing).

The cost of the original battery is 2 000–2 500 ₽. Beware of fakes priced at RUB 800–1,200!