Xiaomi Redmi Note 7 is one of the most popular smartphones of 2019, but even after 4-5 years of operation owners face a problem: the battery runs out in half a day, and sometimes in a few hours. If your device discharges too quickly, it does not always mean that the battery is “dead.”
In this article, we'll look at all the possible causes of the Redmi Note 7's rapid discharge, from the banal wear of the battery to the hidden MIUI features that eat up charge in the background. You'll learn how to diagnose a problem without special tools, what settings to change first, and when it's really time to change the battery, and at the end you'll find a checklist with step-by-step steps to maximize battery life.
1. Natural wear of the battery is the main cause
Lithium polymer batteries used in the Redmi Note 7, They have limited resources, usually 300-500 And then the capacity starts to fall steadily, if your smartphone is running from the top of the system. 2019 The battery has probably already lost its capacity. 20-40% from the original container (original container — 4000 mAhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh).
How do you check the wear?
- 📱 Enter the code ##4636## in the phone app, go to Battery Information. Level will show the current charge and health will show the state (ideal value is good).
- 🔋 Use apps like AccuBattery (available on Google Play) to show the actual battery capacity and wear rate as a percentage.
- ⚡ If the smartphone is discharged on 10-15% an hour in standby mode (screen is off, Wi-Fi is on) is a clear sign of wear and tear.
What to do? Unfortunately, you can't restore the capacity, just replace the battery. The original battery for the Redmi Note 7 (article MB-J10B) costs about 1000-1500 rubles. Importantly, buy only from trusted sellers, as counterfeits can be dangerous (bloating, overheating).
⚠️ Warning: If the battery is swelling (the case of the smartphone began to "spark"), immediately turn it off and do not use.
2.Background applications and “gluttonous” services
MIUI is known for its love of background processes, and even if you haven't manually run applications, they can run in hidden mode, consuming charge, especially when it comes to:
- 📲 Social networks (Facebook, Instagram, TikTok) – they constantly sync data).
- 📍 Geolocation services (Google Maps, Yandex.Maps, taxi applications).
- 🔔 Messengers (WhatsApp, Telegram, Viber – even in the background they keep a connection with servers).
- 🎮 Notification games (PUBG Mobile, Genshin Impact – They Can Run Background Updates).
How to find and disable “gluttonous” applications?
- Go to Settings → Battery and Performance → Battery Use.
- Look at the list of applications, sorted by charge consumption, and if an application consumes >10% per day, that's a good thing to be wary of.
- Click on the application → “Limit background activity” or “Disable autostart”.
For a radical solution:
- 🛑 Turn off auto-start for all unnecessary apps: Settings → Annexes → Auto-start.
- 🔄 Enable the "charge saving" mode in Settings → Battery (limits background activity).
- 🚫 Disallow geolocation for applications that don’t need it: Settings → Confidentiality → Permits → geodata.
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If you don’t use Google Play Services (for example, you only have Chinese apps), disable it in your app settings, which will save you up to 15% of your charge per day.
3. MIUI failures and update errors
The Redmi Note 7 received MIUI updates until 2022, but many users note that after some updates, the battery began to go down faster.
- 🐛 Firmware bugs (for example, Android System malfunctions or MIUI Daemon).
- 🔄 Conflicts after the update (old settings are not compatible with the new version) MIUI).
- 📦 «Garbage in cache that accumulates after multiple updates.
How to fix it:
- Clear the cache: Go to Settings → Storage → Cache data and click “Clear”.
- Reset settings: If the problem appears after the update, try Settings → About Phone → Reset (does not delete files, but resets system settings).
- Reverse to old firmware: If the battery starts to run out after a specific update, you can return the previous version of MIUI via Fastboot (instruction below).
For firmware rollback:
1. Download the desired version of MIUI from en.miui.com.
2. Uncancel the file and place it in a folder with Fastboot tools.
3. Connect the phone in Fastboot mode (press Power + Volume Down).
4. Follow the command:
fastboot flash all name file.zip
5.Reboot the phone: fastboot reboot.⚠️ Attention: Firmware rollback erases all data! make a backup through Settings → Additionally. → Backup and reset.
4. Incorrect screen and brightness settings
The Redmi Note 7 (6.3 inches, IPS LCD) display is one of the main charge consumers. If the brightness is set to maximum or the adaptive backlight is running with errors, the battery will go down 2-3 times faster.
Check it out.
- 🌞 Brightness: Optimal value — 40-60%. Maximum (100%) reduce the time of work by 30-40%.
- 🔄 Adaptive brightness: Included in Settings → Display. → Adaptive brightness. Sometimes the light sensor will malfunction and overstate the brightness.
- ⏱ Screen timeout: If the screen goes out through 30 - I'm good, if you're in 5-10 minutes - the battery is discharged in vain.
- 🎨 Dark theme: Include it in Settings → Display. → Dark subject. IPS-The screen saves up to 10% of the charge.
How to set up optimally:
| Parameter | Recommended value | Saving charge |
|---|---|---|
| Screen brightness | 40-50% | 25% |
| Screen timeout | 15-30 seconds. | 15% |
| Adaptive brightness | Turn off (if the sensor fails) | 20% |
| Dark subject. | Turn on | 10% |
| Update frequency (if unlocked) | 60 Hz (not 90/120 Hz) | 30% |
Set brightness to 40-50% | Turn off adaptive brightness (if not needed) | Reduce screen timeout to 30 seconds | Turn on dark theme | Check refresh rate settings-->
5 Network problems: Wi-Fi, mobile internet and GPS
If your Redmi Note 7 is constantly “catching” the network – whether it’s a weak Wi-Fi signal, unstable 4G or active GPS – the battery will run out at an accelerated rate, especially in areas with poor coverage (metro, basements, suburbs), where the phone spends energy searching for a connection.
How to diagnose:
- 📶 Look at the signal indicator: if it flashes or shows constantly 1-2 dividing – the phone spends a lot of energy on maintaining communication.
- 🔍 Go to Settings. → SIM-maps and mobile networks → Network selection: If it's "Automatic," and the network often switches between 3G/4G — Choose from hand-picked.
- 📡 B Settings → Wi-Fi → Also check if "Network Search in the Background" is enabled. Turn it off.
Recommendations:
- 🚫 Turn off mobile internet and Wi-Fi if you don’t use them (for example, at night).
- 📍 Use it. GPS Many apps (like Google Maps) continue to monitor location in the background.
- ⚡ Enable In-plane mode in uncoated areas (metro, elevator) – this will prevent useless network search.
How to check which app uses GPS in the background?
6. Viruses, Mining and Malware
If the Redmi Note 7 is not just fast, but abnormally fast (e.g., 30% in an hour without active use), there is a risk that malware is running on it, especially if you install apps from third-party sources (not Google Play).
Signs of infection:
- 🔥 The phone is warming for no apparent reason (even in standby mode).
- 📈 B Settings → The battery is visible to an unknown high-consumption application (e.g. com.android.system or random set of letters).
- 💻 Unknown processes appear in Task Manager (call it by holding the button "Recent Applications»).
How to check and clean:
- Install an antivirus (Malwarebytes, Dr.Web Light) and scan the system.
- Check the list of installed applications: Settings → Apps → App management. Remove suspicious ones.
- If nothing helps, make a complete reset (Settings → Additional → Recovery and Reset).
⚠️ Warning: Some of the "battery optimizers" from Google Play are themselves malicious! Use only proven antiviruses.
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If you have removed suspicious applications, your smartphone has been infected, and if you have removed the suspicious applications, install them only from official sources and do not give them unnecessary permissions (e.g. access to SMS or geodata).
7. Physical damage and hardware problems
Sometimes the reason for quick discharge is not the software, but the hardware.
- 🔌 Faulty charging connector (bad contact leads to incomplete charging).
- 🔥 Overheating of the processor (Snapdragon 660 in Redmi Note 7 is prone to this at high loads).
- 💧 Moisture infestation (even if the phone didn't sink, condensation could damage the board).
- 🔋 Short circuit in the supply chain (for example, after a fall).
How to diagnose:
- Check if the phone is warming up in standby mode, and if so, maybe a short circuit or a processor problem.
- Connect charging: if the indicator flashes or charging is interrupted, the problem is in the connector or cable.
- See if the battery is swollen (carefully lift the back cover if it is removable).
Decisions:
- 🔧 If the problem is the connector - it can be replaced (cost of repair: 800-1500 ruble).
- ❄️ If overheating, try resetting to factory settings or replacing the thermopaste (in the service center).
- 🚰 If the phone was in contact with water, do not turn it on – immediately carry it to the service.
8. Non-original chargers and cables
Using cheap or uncertified chargers can not only slow charging, but also damage the battery, reducing its life. Redmi Note 7 supports Quick Charge 4.0 (18 watts), but if the charger does not meet the standard, the phone will charge slower or unstable.
Signs of poor charging:
- ⚡ The phone only charges at a certain position of the cable.
- 🔋 Charging is jerky (these 1%, then 0%).
- 🔥 The charger or cable is heated.
What to do:
- 🔌 Use the original charging Xiaomi (5V/2A or 9V/2A) Certified analogues (Anker, Baseus).
- 🔄 If the cable is damaged, replace it (cost: 300-600 ruble).
- 📊 Check the charging current with the Ampere app (should be) ~1500-2000 fast-charging).
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Never use chargers from other brands (such as Samsung or iPhone) without checking compatibility! They can give out the wrong voltage, which will lead to battery damage.