When to change the battery on the Redmi Note 5 and why it matters
Xiaomi Redmi Note 5 (codenamed Whyred) was released in 2018, but still remains popular among users due to its balanced characteristics and low price in the used market. However, after 4-5 years of operation, even the highest-quality battery loses up to 30-50% of capacity - the phone begins to run out in a couple of hours, turn off at 20-30% charge or overheat during charging. If your Redmi Note 5 began to "live from socket to socket", it is time to think about replacing the battery.
The manufacturer claims a battery life of 500 full charging cycles, but in practice this figure depends on the operating conditions: frequent overheating, the use of non-original chargers or a discharge of up to 0% reduce the life of 1.5-2 times.
- 🔋 Phone's running out of power. 3-4 hours with moderate use (social networks, messengers)
- 🔥 The body heats up strongly during charging or playing
- ⚡ The percentage of charge "jumps" (for example, from 40% immediately to 15%)
- 🛑 The device is switched off when 20-30% The indicator shows the remaining
- 🐢 Charging takes 4.+ hour (with a proper power supply)
Many users are delaying replacements for fear of high prices, but the average cost of a new battery for the Redmi Note is a big deal. 5 into 2026 year-round 500-800₽, A full replacement in the service will cost 1200-3500₽ — in 5-10 It's cheaper than buying a new smartphone, and then we'll look at where to change the battery, how to choose a quality battery, and what to look for when you replace yourself.
How much does it cost to replace a battery in service centers (prices 2026)
The cost of replacement depends on three factors: battery type (original / analogue), region (prices in Moscow and regions differ by the same factor). 20-30%) The following is the current price list for the Redmi Note: official partner of Xiaomi or private workshop. 5 June 2026 year-end:
| Type of service | Cost of work (₽) | Battery cost (₽) | Totally (₽) | Guarantee |
|---|---|---|---|---|
| Official Xiaomi Service (Mi Service) | 1 200 – 1 800 | 1,500 – 2,200 (original) | 2 700 – 4 000 | 6-12 months |
| Authorized Partner of Xiaomi | 800 – 1 500 | 1000 – 1,800 (original/analogue) | 1 800 – 3 300 | 3-6 months |
| Unofficial service (with guarantee) | 500 – 1 200 | 500 - 1,500 (analogue) | 1 000 – 2 700 | 1-3 months |
| Private Master (without warranty) | 300 – 800 | 400 - 1,000 (analogue) | 700 – 1 800 | No. |
⚠️ Attention: In official services Xiaomi often refuse to put non-original batteries - only branded with catalog number MBJ406840 (4000 mAh if you are offered an "original" less than 1500 mAh₽, It's probably a fake. You can verify the authenticity of the:
- 🏷️ Hologram on the package (must change color when tilted)
- 🔍 Serial number (checked through Xiaomi website)
- 📦 Set (original comes with protective film and instructions)
Prices in the regions may differ: for example, in St. Petersburg, the replacement will cost a lot of money. 10-15% To save money, order the battery yourself (on AliExpress or in trusted stores like MegaBattery), and then take it to the service - so you will pay only for the work (500-1200₽).
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Before replacing, ask the wizard to check the state of the charging connector and the power controller – often fast discharge is not associated with the battery, but with oxidized contacts.
Self-replacement: step-by-step instructions and risks
You can replace the battery with a Redmi Note 5 yourself, if you have experience disassembling equipment or at least a screwdriver with a set of plastic blades. The main difficulty is the adhesive fixation of the battery: it must be carefully separated without damaging the plumes.
- 🔧 Set of screwdrivers (cross, flat, torks) T3-T5)
- 📱 Plastic blades or mediators
- 🔥 Hair dryer or thermoplatform (to soften glue)
- 🧴 Isopropyl alcohol (for cleaning contacts)
- 🔋 New battery (capacity of at least 4000 mAh)
Turn off the phone and remove it. SIM-map|Discharge the battery before 20-30% (safe)|Prepare the workplace (clean surface, good lighting)|Make a backup of the data (in case of errors)|Wear an antistatic bracelet or gloves-->
Step-by-step process:
- Remove the back cover by putting a plastic blade on the headphone jack. Be careful, the lid is attached to the latches!
- Unscrew 12 screws (of different lengths, remember the location!) and disconnect the battery plume.
- Put a capron thread on the battery, or use a special battery suction cup to carefully remove it.
- Remove the glue residues with alcohol, install a new battery and assemble the phone in reverse order.
⚠️ Warning: If the phone doesn’t turn on or discharges quickly after replacement, check:
- 🔌 Correct connection of the battery plume (must click)
- 🔋 Polarity of contacts (plus/minus not confused)
- 🛠️ Integrity of the power controller (can burn in CZ)
The self-substitution will be in 500-1500₽ (battery + tools, but risks are high: damage to the display plume (repair price — 3000-5000₽), battery rupture (fire hazard) or loss of leakage (dust/moisture will get inside.
What if the battery does not hold charge after replacement?
Where to buy the original battery for Redmi Note 5: verified sellers
Xiaomi’s parts market is flooded with fakes, so it’s better to buy the battery in proven locations.The original battery is labeled BM40 (or MBJ406840), has a capacity of 4,000 mAh and weighs ~85 grams.
| Salesman | Price (₽) | Pluses | Cons |
|---|---|---|---|
| Official Xiaomi Store (mi.com) | 1 800 – 2 200 | 100% original, warranty 1 year | Long delivery, often not available |
| AliExpress (Xiaomi Official Store, MegaBattery) | 800 – 1 500 | Price is lower, fast delivery (7-14 days) | Risk of counterfeiting (check reviews) |
| Beru/Ozone/Yandex Market (sellers with a rating of 4.8+) | 1 000 – 1 800 | Quick delivery, possibility of self-delivery | Price higher than on AliExpress |
| Local parts stores (e.g. "Fix-Price Repair") | 1 200 – 2 000 | You can check before buying. | Limited range |
When buying, pay attention to:
- 📅 Date of production (originally indicated on the label, not older than 1 year)
- 🔋 Capacity (must be at least 3900 mAh, checked by a tester)
- 🛡️ Protective film (on the contacts of the original there is an insulation gasket)
⚠️ Note: AliExpress batteries often come in low to 0%. Charge them to 50% before installation. USB-tester or special charger for Li-Pol batteries.
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Buy a battery only with the BM40 or MBJ406840 markings – other models (such as the Redmi Note 5 Pro BM41) will not fit in size and connector!
How to prolong the life of a new battery: 7 rules
Even the original battery will last longer if you follow simple guidelines: Li-Pol batteries' main enemies are overheating, deep discharge, and fast charging on cheap power supplies.
- 🔋 Keep the charge between 20% and 80% – extremes (0% and 100%) reduce the resource.
- 🔥 Avoid overheating (do not play heavy games on charging, do not leave your phone in the sun).
- ⚡ Use the original RAM (or Quick Charge 3.0 support).
- 🛌 Do not leave on charging overnight – after 100% turn off the power.
- 📴 Turn off background processes (in Settings) → Battery → Optimization).
- 🔄 Calibrate once every 3 months: discharge to 0%, then charge to 100% without interruptions.
- 🚫 Do not use wireless charging – it heats the battery stronger than wired charging.
Modern Android 10+ smartphones (including the Redmi Note 5 after the update) support the “Adaptive Charging” feature (Settings → Battery → Additional).
If you follow these rules, the new battery will last 3-4 years without noticeable loss of capacity. For comparison, when chaotic charging (0-100%, overheating), the resource is reduced to 1.5-2 years.
Frequent battery replacement errors and how to avoid them
Even experienced users sometimes make mistakes that cause a phone to break down or a new battery to fail quickly.
- Use a non-original battery of poor quality, batteries without overcharging protection can swell or ignite. PCB-charger (controller) on the battery.
- Damage to the display plume when disassembled. It goes along the battery -- just peel it on the opposite side!
- Incorrect calibration after replacement. If you don't do the full discharge/charging cycle, the phone will show the wrong percentage.
- Using metal tools to separate the glue, it can puncture the battery, use only plastic.
- Charge immediately after replacement, give the battery a rest for 1-2 hours before first turning on.
⚠️ Warning: If your phone stops turning on after you've replaced, don't panic. possible causes and solutions:
- 🔌 The battery plume has disconnected – take apart the phone and check the contacts.
- 🔋 The battery is discharged to zero - connect to the ROM on 10-15 minutes, then try to turn on.
- 🛠️ Controller protection is triggered – turn off charging, remove the battery for 1 minute and insert back.
If nothing helps, contact the service - it is possible that the power controller (chip) was damaged when replacing. PM660 It's a motherboard, and it's going to cost you to repair it. 1500-2500₽.
Alternatives to Replacement: When You Can Do Without a New Battery
It's not always the battery that causes a quick discharge.
- 📱 Software status: Update your firmware to the latest version (Settings) → The phone. → System Update? Check battery consumption in Settings → Battery → Use – if a process eats away >10%, uninstall the app. Turn off app auto-update and geolocation for unnecessary services.
- ⚡ Charger and cable: Use the original power supply (5V/2A or 9V/2A). Check the cable for damage (bending, bare wires) and clean the microUSB connector from dust with a toothpick (not metal objects!).
- 🔧 Hardware problems: Check the current consumption in standby mode (should be) <0.1If above, look for a “gluttonous” application or a faulty module (e.g., a “gluttonous” application, GPS). Measure the battery voltage with a tester (normal: 3.7–4.2V). If below 3.5V — replacement.
If after all the manipulations the phone still discharges in 2-3 hours, and the battery capacity (checked in Settings → Battery → Status or through AccuBattery) fell below 60% – without replacement can not do.