Xiaomi Redmi 5A is one of the most popular budget smartphones, but over time, its battery begins to “lie”: the phone turns off at 20-30% charge or suddenly “jumps” from 50% to 15%.
In this article, we'll give you a proven manual for calibrating the Redmi 5A battery with MIUI firmware (including global and Chinese versions), and we'll look at when it's really necessary and when it's time to change the battery, and give you 3 alternative methods for different situations, all of which have been tested on 2026 devices with the latest updates.
When to Calibrate the Battery on Redmi 5A
Calibration is not a panacea, it's a diagnostic tool, and it helps if you:
- 🔋 The phone turns off when 15-30% although it had previously been used before 5-10%.
- 📉 The percentage of charge "jumps" (for example, from 45% immediately to 20% after rebooting).
- 🔌 After full charge, the battery is discharged for 2-3 hourly.
- 🔄 B Settings → Battery → The use of the discharge schedule is uneven.
In some cases, calibration is useless and even harmful:
- ⚡ The battery swelled (see above the raised back cover or enlarged body).
- 🔥 The phone overheats when charging or working.
- ⏳ Battery life has been reduced in 2-3 time compared to the new state.
⚠️ Note: If after calibration the problem remains, check the settings → The phone. → Version. MIUI. On old firmware (below) MIUI 10) the battery controller is not working correctly - an update is required.
Calibration Preparation: What to Do in Advance
Incorrect preparation can result in resetting or even damage to the battery controller.
Charge your phone to 100% (use the original 5V/1A adapter)
Turn off the settings → Battery → Battery Optimization
Remove all tasks from recent apps (swipe up the screen)
Turn off Wi-Fi, Bluetooth and Mobile Data
Make a backup of the data through Settings → Additionally. → Backup-->
Pay special attention to the charger. Redmi 5A is sensitive to charging current:
- ✅ Adapters Allowed: Original Xiaomi 5V/1A, 5V/2A (but not fast charging!).
- ❌ Prohibited: Adapters with output >2A, wireless charging, power bank with unstable voltage.
If you have custom firmware installed (like LineageOS), calibration through the standard menu may not work, in which case you will need to reset Battery Stats via ADB (instructions in the advanced user section).
Method 1: Calibration through the engineering menu (without root)
This is the official method from Xiaomi, which works on all versions of MIUI for Redmi 5A. It does not require superuser rights, but you need to follow the sequence exactly:
- Charge the phone to 100% (the indicator should show "Charge completed"). Leave connected to the network for another 1 hour.
- Turn off the charger and turn off the phone. Wait 5 minutes.
- Press the Volume Up + Power buttons at the same time and hold on for 10-15 seconds until the Mi logo appears.
- With the help of volume buttons, select Recovery Mode and confirm Power button.
- From the Recovery menu, select Wipe & Reset → Wipe Battery Stats (some firmware may call it Battery Calibration).
- Reboot your phone and discharge it until it is completely turned off (do not turn it on until it is discharged!).
- Charge your phone back to 100% without interruption.
⚠️ Warning: If the phone starts to run out faster after calibration, it means the battery is worn out. Check its condition through the AccuBattery app (battery health score below 70% - critical).
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Calibration through the engineering menu resets the battery controller statistics, but it doesn't restore battery capacity. If the battery is physically worn out, the procedure won't help.
Method 2: Manual calibration through full charging cycles
This method is suitable if the engineering menu is not available (for example, on a locked bootloader), it is based on the forced zeroing of the controller data by deep discharge:
- Charge your phone to 100% and keep charging for another 2 hours after reaching the maximum.
- Turn off charging and use your phone in intensive mode (games, videos, navigation) until it turns off.
- Do not turn on the phone for at least 6 hours – this is important for the full discharge of capacitors.
- Connect charging and charge up to 100% without interruptions (do not use your phone while charging!).
- Repeat the cycle 2-3 times in a row.
The effectiveness of the method depends on the degree of wear of the battery:
| Battery Health (accuBattery) | Calibration effect | Recommendation |
|---|---|---|
| 80-100% | Restore accuracy to 95% | Repeat every 6 months |
| 60-80% | Partial improvement (jumping up to 10%) | Calibration + reduce the load |
| Below 60% | Minimum effect | Battery replacement |
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If the phone doesn't turn on after a deep discharge, hold the Power button for 30-40 seconds. If it doesn't work, plug it into charging for 15 minutes, then try turning it on.
Method 3: Calibration through ADB (for advanced)
If standard methods don't work, you can reset battery statistics via Android Debug Bridge (ADB), which requires a computer and enabled USB debugging.
Step-by-step:
- Turn on Settings → About Phone → MIUI version (click 7 times to become a developer).
- Return to Settings → Additional → For developers and activate Debugging over USB.
- Connect your phone to your PC, open the command line and type in: Adb devices (your device should appear).
- Execute the command to reset the statistics: adb shell dumpsys battery reset
- Then reset the charging data: adb shell dumpsys batterystats --reset
- Turn off your phone and complete the full discharge-charging cycle (as in Method 2).
⚠️ Attention: Teams ADB If you don't see the device when you enter adb devices, install Xiaomi drivers USB Drivers and check the cable (better use the original one).
What if the ADB can’t see the device?
Frequent Mistakes and How to Avoid Them
Even the most experienced users make calibration errors that make things worse. TOP-5 Failures and how not to repeat them:
- 🔌 Use of a non-original charger → This leads to incomplete charging and false data from the controller. 5V/1A or 5V/2A.
- ⏱️ Interruption of the charging cycle → If you disconnect your phone from the network by 50 percent, the calibration will reset. Charge continuously to 100%.
- 📱 Turning the phone on during discharge → The controller is recording an incomplete discharge.
- 🔄 Calibration on custom firmware without resetting Battery Stats → on LineageOS or AOSP First, do adb shell dumpsys battery reset.
- 🔋 Ignoring temperature → If the phone overheats during calibration (above 40)°C), the procedure should be repeated after cooling down.
If after calibration the problem has returned 1-2 It's a sign of critical battery wear, and in this case, it's only a replacement that helps. 5A articulate BM47 (capacity 3000 The cost is from 800 before 1200 ruble (2026 year).
How to extend battery life after calibration
Calibration will return the exact charge reading, but it won't stop the battery from degrading.
- 🔋 Avoid full discharge – recharge your phone when 10-20% charge.
- ⚡ Don’t keep on charging all night – turn off the cable after 100% (or use smart timer outlets).
- 🌡️ Control the temperature – do not use your phone in the sun or under a blanket while charging.
- 📵 Disable unnecessary modules – Wi-Fi, Bluetooth, GPS and NFC Battery discharge even in the background.
- 🔄 Update the firmware - in new versions MIUI Optimized operation of the battery controller.
To monitor the battery status, install the AccuBattery app (free version is sufficient).
- Real battery capacity (compare with passport 3000 mAh).
- Discharge speed in standby and under load.
- Battery temperature (normal: 25-35°C).
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Optimal charging mode for the Redmi 5A: Keep the charge between 20% and 80%, which reduces the load on the battery and extends its life by 30-40%.