Xiaomi Redmi 4 is one of the most popular budget smartphones of 2017, and is still used by many users. However, over time, even the most reliable appliances require maintenance, and the battery is the first part that fails. If your Redmi 4 quickly discharges, spontaneously turns off or inflates, it’s time to deal with the battery.
In this article, we will explain in detail what battery is installed in the Xiaomi Redmi 4 by default, how to check its condition, where to buy an original replacement and how to change the battery with your own hands. You will also learn which analogues are compatible with this model and how to avoid buying a fake. If you are planning a repair, here you will find a step-by-step instruction with photos and videos.
Important: information is relevant for all Redmi 4 modifications, including Redmi 4 Pro, Redmi 4 Prime and Redmi 4A (Although the latter has a different battery capacity. For accuracy, specify the model in the phone settings along the Settings path. → The phone. → Model.
Original battery Xiaomi Redmi 4: technical specifications
From the plant Xiaomi Redmi 4 (model 2016010) is equipped with a non-removable lithium-polymer battery with the following parameters:
- 🔋 Capacity: 4100 mAh (nominal), the real capacity after 2-3 years of operation usually falls to 60-70%.
- 🔌 Voltage: 3.85 V (typical for Li-Pol batteries).
- 📏 Sizes: 148.5 × 71.5 × 3.5 mm (exact dimensions are important when choosing an analogue).
- 🔧 Type of fastening: glued to the back cover, connected through a plume to the motherboard.
The original battery has a marking. BM47 or DM47 (depending on the lot) and is manufactured by Sunwoda or ATL (Xiaomi subsidiaries, the original case must be present:
- 🏷️ Hologram with Mi logo.
- 📄 QR-authentication code (can be scanned through the Mi Verify app).
- ⚖️ Weight. ~45 grams (fakes are often easier by 5-10 g).
The Redmi model 4A Battery capacity is less than 3120 mAh, and labeling begins with BM41. Don’t confuse them when buying!
How to check the status of the Redmi 4 battery without disassembly
Before you buy a new battery, make sure it's the problem. Here are 3 ways to diagnose without opening your phone:
- Through the phone menu: go to Settings → Battery → Battery status: If the capacity is shown as "Good" or "Normal" but the phone runs out in 3-4 hours, it may be the software or background processes that are to blame.
- With help. USSD-Code: type in dial ##4636##, select Battery Information.Battery Health below 80% - Critical wear and tear.
- Diagnostic applications: AccuBattery (Android) or AIDA64 show the actual capacity, temperature and number of charging cycles.
⚠️ Warning: If the phone swells (back cover is coming out, screen is "bulging"), immediately turn it off and do not use it until battery replacement.
What to do if the battery is swelling?
Where to buy the original battery for Redmi 4: proven options
The original Xiaomi Redmi 4 batteries can be purchased in the following locations (sorted by reliability):
| Source | Average price (2026) | Pluses | Cons |
|---|---|---|---|
| Official Xiaomi website | 1 200–1 500 ₽ | 100% original, 6 months warranty | Long delivery, often not available |
| AliExpress (official stores) | 800–1 100 ₽ | Price is lower than in Russia, many reviews | Delivery 2-4 weeks, risk of counterfeiting |
| Xiaomi Service Centers | 1 500–1 800 ₽ (fittingly) | Quick replacement, check before installation | Prices are higher, not all cities |
| Yandex Market/Ozon | 900–1 400 ₽ | Quick delivery, you can choose with a guarantee | Lots of fakes, read reviews |
🔍 How to distinguish the original from the fake:
- 📦 The package must have a serial number, which can be checked on the Xiaomi website.
- 🔍 Hologram on the battery changes color when tilted.
- ⚖️ Weight of the original - 45±2 grams (forgery is easier).
- 🔌 The contact of the plume should be golden in color, not copper.
⚠️ Warning: If the seller offers a battery cheaper than 700 ₽, This is almost guaranteed a fake with a capacity of 2000-2500 mAh instead of the declared 4100 mAh.
💡
Before buying, ask the seller to send a photo of the battery with a hologram and QR-The original code. QR You should lead to the Xiaomi verification page, not to a third-party site.
Step-by-step: how to replace the battery in Redmi 4 yourself
Replacing the battery in Redmi 4 requires care, but it’s no more difficult than replacing the screen.
- 🔧 Set of screwdrivers (cross-haul) PH00, flat-plastic mediator).
- 🔥 Hair dryer or thermo-air station (for softening glue).
- 🧲 Screen removal suction cup (optional).
- 🩹 Scotch or double-sided Scotch for a new battery.
Turn off the phone and remove it. SIM-map|Discharge the battery to 20-30% (minimizes the risk of fire)|Prepare the workplace: clean surface, good lighting|Take a picture of the location of the plumes before disassembly|Wear an antistatic bracelet (optional)-->
Step 1 Remove the back cover
Heat the phone edge with a hairdryer (temperature) ~60°C) for 2-3 minutes to soften the glue. Carefully apply the lid with a plastic mediator starting at the bottom edge (near the Micro-USB connector!
Step 2. Disconnect the battery plume
When you take the lid off, you'll see a battery pack with a black film, unplug it, and disconnect the power plume with a plastic blade. Don't pull the wires. The plume is attached with a latch, gently tuck it in.
Step 3: Remove the old battery
There's a tape underneath the battery, and you pick it up and you pull it slowly until the battery goes away. If the glue is too strong, you warm it up again. Don't bend the battery! It can short circuit.
Step 4: Installation of a new battery
Make sure the new battery contacts match the old ones, glue it to a double-sided tape (complete with the original battery) and plug in the plume, make sure the latch is locked.
Step 5: Build the phone
Put the plumes back in place (check the photo taken before disassembly), glue the back cover and snap it around the perimeter. Turn on the phone and check the charge.
🎥 Video instruction (in English, but the process is visual):
Link to YouTube (replace) EXAMPLE real ID video).
1. Is the battery plume connected correctly?
2. Is the motherboard damaged during disassembly?
3. Charge the phone for 10-15 minutes – the new battery can be completely discharged.-->
Previous Previous post: What to Choose if There Is No Original Battery
If the original battery BM47 It's not available, you can look at quality analogs from proven brands, and the main thing is that they meet the following parameters:
- 🔋 Capacity: at least 4000 mAh (better 4100-4200 mAh).
- 📏 Sizes: 148.5 × 71.5 × 3.5 mm (tolerance) ±0.5 mm).
- 🔌 Type of plume: JST 1.0 4-pin (original).
Best analogues (according to user reviews):
| Brand/Model/Model/ | Capacity | Price (2026) | Features |
|---|---|---|---|
| ZOP Power (model) ZOP-BM47) | 4200 mAh | 900–1 100 ₽ | Good quality build, close to the original |
| Baseus (Battery Pro Series) | 4100 mAh | 1 000–1 300 ₽ | Long life, but a little thicker than the original |
| Remax (model) RMB-47) | 4000 mAh | 700–900 ₽ | Budget option, but it sits down faster |
⚠️ Attention: Cheap batteries without a brand (price) < 600 ₽) They often have a real capacity of 2,000-2500 mAh instead of the stated one!
How to check the real capacity of a new battery?
How to extend the life of the battery Redmi 4: 7 practical tips
Even the original battery will last longer if you follow these guidelines:
- Avoid full discharge: the optimal charge range is 20-80%, full discharge (0%) and overcharging (100%) reduce the life of the battery.
- Don’t use cheap charging: the original adapter Xiaomi (5V/2A) Certified analogues (Baseus, Anker).
- Turn off fast charging (if enabled): in Settings → Battery → Fast charging.
- Do not load your phone in the heat: temperatures above 35°C capacity drops faster. Don't leave your phone in the sun or near the heater.
- Close the background applications: use Settings → Annexes → Auto-start to disable unnecessary processes.
- Update: In new versions MIUI Optimized energy consumption.
- Keep your phone with 50% charge if you don’t use it for a long time (for example, during a vacation).
📊 Battery life depending on conditions:
- 🔥 Extreme conditions (heat, cold, cheap charging): 1–1.5 years.
- ⚠️ Average conditions (usual use): 2-3 years.
- ✅ Ideal conditions (follow the advice above): 3-4 years.
Frequent Redmi 4 battery problems and solutions
If you have any problems after replacing the battery, check these points:
| Problem. | Possible cause | Decision |
|---|---|---|
| The phone will not turn on after replacement | Unconnected plume or damaged board | Check the connection of the plume, try another battery |
| Fast discharge of the new battery | Counterfeit or uncalibrated controller | Check the capacity through AccuBattery, do the calibration (discharge to 0%, charge to 100%) |
| The phone spontaneously turns off at 20-30% | Battery wear or power controller failure | Replace the battery if the problem persists - the motherboard is faulty |
| It doesn’t charge or it goes very slowly. | Problem with Micro-USB connector or charger | Clean the connector with alcohol, try another cable / charging |
If none of these things worked, there might be a problem with the motherboard's power controller, which would require a diagnosis at the service center.