Any smartphone sooner or later faces the problem of a worn-out battery – Xiaomi Redmi Note 7 It's no exception. 2-3 The battery starts to discharge in a few hours, the phone turns off when the battery is used. 20-30% It's a little bit of a charge, and sometimes it doesn't work at all without a charger, and if you notice these symptoms, you should think about replacing them. 2026 Where do you want to go, the official service, the third-party repairs, or try to do it yourself?
In this article, we will analyze the current prices for battery replacement for the Redmi Note 7 (model). M1901F7G), We'll compare the cost across different services, talk about the pitfalls of cheap offers, and give you a checklist for those who decide to change the battery themselves, and you'll learn how to check the originality of a new battery and avoid repair errors.
How much does it cost to replace a battery in 2026: a comparison of prices
The cost of replacement depends on three key factors: type of service, battery quality and region: Moscow and St. Petersburg have traditionally higher prices than the regions, but the difference rarely exceeds the price range. 15-20%. Below are the current prices for June 2026 year (indicated with work, without taking into account the diagnosis).
| Type of service | Cost (₽) | Type of battery | Guarantee |
|---|---|---|---|
| Official Xiaomi Service (Mi Service) | 3 200 — 4 500 | Original (or certified analogue) | 6–12 months |
| Authorized partner centers | 2 800 — 3 900 | Certified analogue (e.g. Desay) | 3–6 months |
| Third-party service centers (unofficial) | 1 500 — 2 500 | Unoriginal (Chinese) OEM quip) | 1–3 months (or absent) |
| Self-sustaining replacement | 800 — 1 800 | Depends on the choice (from cheap replicas to originals) | No (risk of phone damage) |
Important: Prices can vary depending on the dollar (most batteries are imported from China) and stock availability, for example, Xiaomi’s official services sometimes offer discounts of up to 20% on battery replacement for older models. Some workshops also charge an additional fee for disassembling the body (about 500). ₽), If the phone has been damaged before.
If you are offered to replace the battery for 1000-1200 ₽ — It's a good idea to be wary, and you'll probably get a low-quality replica with a capacity of 3000-3500 mAh instead of the original 4000 mAh, which will last six months.
Official Service vs Third-Party Workshops: Which is Better?
The choice between official service and garage craftsmen is always a trade-off between price, quality and warranty, so let's look at the pros and cons of each option.
The official service of Xiaomi (Mi Service):
- ✅ Work warranty and details (usually 12 months).
- ✅ Use original or certified batteries (e.g. from Desay or Sunwoda).
- ✅ Diagnostics before replacement (check the power controller, connectors).
- ✅ The sealed body is maintained (use the original glue).
Cons: the price is higher by 30-50%, sometimes you have to wait in line (especially in large cities).
Authorized partner centers:
- 💰 The price is lower than in the official service, but the quality is often not inferior.
- 🔧 Use certified analogues (for example, batteries from Shenzhen) BAK).
- 📋 Warranty usually 6 months.
Cons: not all centers are conscientious - some save on glue or seals.
Informal workshops:
- 💸 The lowest prices (from 1,500) ₽).
- ⚡ Quick repairs (often here and now").
Risks:
- ⚠️ There is no guarantee for the battery (or it is symbolic).
- ⚠️ A replica with a low capacity can be installed.
- ⚠️ Risk of damage to plumes or display during disassembly.
⚠️ Warning: If the workshop refuses to show the battery before installation or does not provide a check indicating the model of the battery - this is reason to doubt its honesty. BM47 or BM48 and a capacity of 4,000 mAh.
Self-Replacement: Is It Worth Risking?
Replacing the battery with the Redmi Note 7 is technically possible, but it requires care and tools. If you have experience disassembling smartphones, you can save up to 2,000 dollars. ₽. If you don’t have experience, the risk of damaging your phone (especially the flexible plumes of your display or camera) is very high.
What you'll need:
- 🔧 Set of screwdrivers (cross-haul) PH00, flat-scapula).
- 🔥 Hair dryer or thermo-air station (for softening glue).
- 🧲 Screen suction cup.
- 🔋 New battery (we recommend taking from AliExpress or trusted stores, for example, 4PDA Market).
- 🧴 Clay. B-7000 or double-sided tape to fix the battery.
Step-by-step:
Turn off the phone and remove it. SIM-memory-card|
Warm up the back cover with a hair dryer (temperature 60–70)°C)|
Carefully tuck the lid with a plastic spatula, starting at the corner near the charging connector|
Unscrew 12 screws that fix the metal plate|
Disconnect the battery plume (use a plastic tool to avoid damaging contacts)|
Remove the old battery (if it is "inflated", be careful - it may leak!)|
Install a new battery, plug in the plume and assemble the phone in reverse order.-->
If you’ve never taken a smartphone apart, check out the YouTube video manuals (look for high-rated videos and fresh ones no older than 2023).
- 🔌 Do not tear off the battery plume by force - it is glued and can break.
- 🔥 Do not overheat the case - plastic can deform.
- ⚡ Before assembly, check the contacts with a multimeter (voltage of the new battery should be ~3.7–3.8).
⚠️ Warning: If the phone doesn't turn on or discharges quickly after the replacement, there are two possible reasons: 1) the new battery is faulty (check the voltage); 2) the power controller on the motherboard is damaged. ₽).
💡
Before buying a battery, check it for authenticity: the original battery has a hologram with the Xiaomi logo and the original battery. QR-And also pay attention to the weight, because fakes are often 10 to 15 grams lighter than fakes.
How do you know if your battery really needs to be replaced?
Before you bring your phone to the service, make sure that the battery is the problem, sometimes the quick discharge is due to software failures or background processes.
1. Check wear through the phone menu:
- Go to Settings → Battery → Battery status.
- If the capacity is shown as less than 80% of the original (i.e. less than 3200 mAh), it is time to change the battery.
Application-based testing:
- 📱 AccuBattery (shows real capacity and wear).
- 📊 AIDA64 (In the "Battery" section, the temperature, voltage and state are displayed).
Visual signs:
- 🔋 Battery swelled (phone case deformed, screen "goes away").
- ⚡ The phone turns off at 20-30% charge.
- 🔥 The body heats up more than usual when charging.
If all the signs indicate wear and tear, but you doubt it, contact the service for a free diagnosis. Many workshops check the battery with a multimeter or with a tester. HC-6001 (The cost of diagnosis is usually included in the price of repair).
What if the phone doesn’t turn on after the battery is replaced?
Where to buy a high-quality battery for self-replacement?
If you decide to change the battery yourself, the main thing is not to run into a fake. Below are proven sources where you can buy an original or quality alternative battery for the Redmi Note 7:
| Source | Cost (₽) | Pluses | Cons |
|---|---|---|---|
| Official Mi Store (if available) | 1 800 — 2 500 | 100% original, guarantee | It's rare to be on sale. |
| AliExpress (sellers with a rating of 98%+) | 800 — 1 500 | Low price, big choice | Long delivery, risk of counterfeiting |
| 4PDA Market (section "Batteries") | 1 200 — 2 000 | Verified sellers, reviews | Price higher than on AliExpress |
| Local parts stores (such as Chip and Deep) | 1 500 — 2 200 | You can take it right away, there is a guarantee. | Limited range |
What to look for when buying:
- 🏷️ Labeling – The original battery has inscriptions BM47 or BM48, Capacity 4000 mAh, voltage 3.85 V.
- 📦 Packaging should be factory, with a hologram and QR-code.
- ⚖️ Weight - the original weighs ~45–50 grams (fakes are easier).
- 🔋 Contacts - should be clean, without oxidation.
Avoid vendors who:
- ❌ Do not provide a photo of the battery with markings.
- ❌ They write 100% original, but the price is below 1,000. ₽.
- ❌ Refuse to provide video with battery test (e.g., capacity check).
💡
Even if you bought an "original" battery, its actual capacity may be lower than the declared one. Once installed, check the capacity through AccuBattery - if it is less than 3800 mAh, this is an excuse to return the goods.
Frequent battery replacement errors and how to avoid them
Even experienced users sometimes make mistakes that lead to additional costs, and here are the most common mistakes and how to prevent them:
1. Damage to plumes during disassembly
The flexible plumes of the display and camera in the Redmi Note 7 are very thin. If you hit them with a metal blade, they will break. Solution: use only plastic or wooden tools.
2. Incorrect battery installation
If a new battery is installed curved or not fixed with glue, it can shift and damage other components.Solution: Use double-sided tape or glue B-7000 fixative.
3. Ignoring the inspection of the power controller
If the phone doesn’t charge or discharges quickly after replacement, the problem may not be in the battery, but in the power controller (chip). PM660 Solution: Before you change your battery, check the phone in the service.
4.Buying a battery with AliExpress without checking
Many sellers send replicas with a capacity of 3000-3500 mAh instead of the declared 4000 mAh Solution: before buying, read reviews and ask the seller to send a video with a battery test.
5. Forget about calibrating the new battery
After replacing the battery, it must be calibrated:
- 🔋 Fully charge your phone (up to 100%).
- 📵 Disconnect from charging and use until automatically shut down.
- 🔌 Repeat the cycle 2-3 times.
This will help the power controller to correctly determine the capacity.