The Xiaomi Redmi 6, released in 2018, is still a popular budget smartphone due to its reliability and maintainability. However, over time, even the best battery loses capacity: the phone starts to run out in a few hours, turns off at 20-30% charge or refuses to turn on without charging at all. If you encounter these problems, replacing the battery is the only solution.
In this article, we will discuss how to change the battery on the Redmi 6 with your own hands, from choosing the original or analog battery to completely disassembling the case and reassembling. You will learn what tools you need, how to avoid typical errors (for example, damage to the plumes or tearing off the adhesive base), and how long it will take for a beginner to process. For clarity, we will give a comparison table of batteries, a checklist for preparation and answers to frequent questions - from "Can I use a larger battery?" to "What to do if the phone does not turn on after replacing?".
Signs of battery wear on Redmi 6: when is it time to change?
The Redmi 6 battery (BM47) is designed for 300-500 full charge cycles, after which its capacity is reduced to 70-80% of the original. In real life, when used actively, this occurs after 2-3 years.
- 🔋 The phone discharges in 3-4 hours with an average load (social networks, instant messengers, calls).
- 🔌 Charging jumps: for example, from 40% immediately drops to 15% or the phone turns off at 20-30%.
- 🔥 The body heats up strongly in the battery area (especially when charging or playing games).
- ⚡ Charging is extremely slow or interrupted (for example, stops at 80%).
- 📵 The phone refuses to turn on without connecting to the network, even if it showed the rest of the charge.
If at least 3 of the 5 features match, it is time to change the battery. To check the exact state of the battery, you can use the engineering menu: enter the code ##4636## in the dialer, go to the Battery Information and compare the current capacity (level) with the passport (3000 mAh for the original Redmi 6 battery).
⚠️ Warning: If the phone is swollen (the case is "opened", the screen has moved away from the frame), you can not try to charge or turn it on - this can lead to fire.
Which battery to choose for Redmi 6: original vs analogues
The original battery for the Redmi 6 is labeled BM47 (or BYD DM-47 in some suppliers) and has a capacity of 3000 mAh. However, after 2020, Xiaomi officially stopped supplying spare parts for this model, so the market is dominated by analogues.
| Type of battery | Capacity | Manufacturer | Pluses | Cons | Price (2026) |
|---|---|---|---|---|---|
| Original (BM47) | 3,000 mAh | BYD, ATL (under the Xiaomi brand) | Perfect compatibility, long service life | Hard to find, high price | 1500–2500 ₽ |
| Analogue (high quality) | 3000–3200 mAh | ZOP, CAM, Green Cell | Good price/quality ratio, easy availability | It can last 10-15% less than the original. | 800–1500 ₽ |
| Increased capacity | 4,000-5,000 mAh | No-name (China) | Longer working without recharging. | Risk of bloating, unstable work, may not fit into the body | 1200–2000 ₽ |
| B/o original | 2500-2900 mAh | Xiaomi (from disassembly) | Low price | Unknown residual resource, risk of rapid wear | 500–1000 ₽ |
For Redmi 6, the best choice is the equivalent of ZOP or CAM with a capacity of 3000-3200 mAh. These manufacturers supply batteries for many service centers and guarantee at least 400 charging cycles. Avoid cheap no-name batteries with AliExpress: they often have an understated real capacity and can damage the smartphone power controller.
When buying, be sure to check:
- 📦 Presence of protective film on contacts (original and qualitative analogues always have it).
- 🔍 Marking: must be consistent with BM47 or DM-47.
- ⚖️ Weight: The original battery weighs ~45 grams (too light is a fake).
- 🔋 Voltage: should be 3.85V (labeled).
💡
Before buying a battery, check it for authenticity with the AccuBattery app (available on the Play Market) that will show the actual capacity and condition of the battery after several charging cycles.
Preparing for replacement: tools and safety
Replacing the battery with the Redmi 6 requires care and minimal tools. Unlike Xiaomi's flagship models, there are no complex cooling systems or waterproof slugs, but the risk of damaging the plumes or display remains.
- 🔧 Plastic blades (2-3 pieces) for dissociating the body.
- 🔨 Cross screwdriver (PH00 or PH0) screw.
- 🧲 Magnetic mat or screw container (easy to lose!).
- 🔥 Hair dryer or thermo-air station for softening glue.
- 🧴 Isopropyl alcohol (90%+) clean-up.
- 🩹 Double-sided tape or glue B-7000 fixing.
- 📱 Suction (optional, for screen removal).
Also prepare the workplace:
- 🪑 Work at a table with good lighting (better to use a desk lamp).
- 🧹 Remove all small items that can get inside the phone.
- ⚡ Turn off the phone and remove it. SIM-map + memory card (if any).
- 🔋 Charge the new battery to 30-50% before installation (this is safer for the controller).
⚠️ Warning: Don't use metal tools to smear the case, they can close the contacts on the board! If you don't have plastic blades, wrap the screwdriver with insulation.
Turn off the phone and remove it. SIM-map|Prepare tools (scapula, screwdriver, hair dryer)|Buy a new battery (proven by the manufacturer)|Charge a new battery to 30-50%|Cleaning the workplace of garbage-->
Step-by-step: how to disassemble the Redmi 6 and replace the battery
The Redmi 6 is relatively simple to disassemble, but it takes patience, and the main difficulty is the adhesive battery base, which can break if you take it off sloppy.
Step 1: Removing the back cover
1. Heat the back cover of the phone around the perimeter with a hair dryer for 1-2 minutes (temperature ~60°C).
2. Insert a plastic blade into the gap between the lid and the body (start with the charging connector). Carefully drive the blade along the edge, separating the lid.
3. After removing the lid, put it aside - it will be useful for reverse assembly.
Step 2: Disconnect the plumes and remove the battery
1 Unscrew 10 screws (they are of different sizes, remember the location!).
2. Unplug the plumes:
- Battery (red-insulated connector).
- Display (wide plume at the top).
Cameras and sensors (small connectors on the right).
3. Put a plastic blade on the battery and pull the black tape (pull evenly, without jerking!) If the glue doesn't lend itself, warm up again with a hairdryer.
Step 3: Installation of a new battery
1. Clean the seat of the glue residues with isopropyl alcohol.
2. Glue the new battery:
If there is a sticky base in the kit, just press the battery.
If not, apply a thin layer of B-7000 glue around the perimeter.
3. Connect the plumes in reverse order (first battery, then display, camera).
Step 4: Assembly of the phone
1. Make sure all plumes are tightly connected (no skewing!).
2. Twirl the screws (do not pull!).
3. Press the back cover and warm it up with a hair dryer for better fixation.
After assembly, turn on the phone and check:
- 🔋 Charging is stable (without jumps).
- 📶 The antenna is working (no network problems).
- 🎥 The camera and display have no artifacts.
What if the phone doesn’t turn on after replacement?
Common Mistakes When Replacing a Battery and How to Avoid Them
Even experienced users sometimes make mistakes that cause their phones to break down, and here are the most common ones and ways to prevent them:
- 🔧 Display plume damage occurs when the lid is sloppy. Solution: use only plastic blades and do not force.
- 🔥 Overheating the battery with a hair dryer can cause swelling. Solution: heat in short intervals (30 seconds) and don't direct the air flow to one point.
- 🧲 Loss of screws is a different size, and they're easy to confuse. Solution: put them in order on a magnetic mat.
- 📉 Incomplete shutdown of the plumes, the phone may not turn on. Solution: check each connector before assembly.
- 🩹 Using superglue instead B-7000 — Solution: Use only specialized adhesive for electronics.
Another common problem is the wrong calibration of the new battery, which may show an incorrect charge level after the replacement (for example, a jump from 100% to 80%).
- Completely discharge the phone before turning off.
- Charge to 100% without interruption.
- Repeat the cycle 2-3 times.
💡
If the battery is discharged quickly after replacement, check if the energy-intensive functions are turned on: Settings → Battery → Power saving mode. Also calibrate the battery as described above.
How much does it cost to replace the battery in vs service on your own?
The cost of replacing a battery with a Redmi 6 varies by region and type of service. Consider the average prices for 2026:
| Replacement option | Cost of battery cost | Cost of work | Totally. | Pluses | Cons |
|---|---|---|---|---|---|
| Independently (analogue) | 800–1500 ₽ | 0 ₽ | 800–1500 ₽ | Savings, experience in repair | Risk of damaging the phone |
| Self-directed (original) | 1500–2500 ₽ | 0 ₽ | 1500–2500 ₽ | Maximum quality | Hard to find the original. |
| Service centre (analogue) | 800–1200 ₽ | 500–1000 ₽ | 1300–2200 ₽ | Work guarantee | More expensive than on your own. |
| Service centre (original) | 1500–2000 ₽ | 500–1000 ₽ | 2000–3000 ₽ | Professional replacement | High price. |
Self-replacement is cheaper, but it takes time and care. If you've never disassembled your phones, you'd better contact the service - especially if you have a model with a bloated battery (it's dangerous to remove it!).
Average replacement time:
- 🕒 In the service: 30-60 minutes (with diagnosis).
- 🕓 Independent: 1-2 hours (for a beginner).