Xiaomi Redmi 5 Plus (codenamed vince) is still popular due to its balanced performance and reliable hardware. However, over time, even high-quality lithium-polymer batteries lose capacity and the charge controller starts to malfunction. If your device suddenly shuts down at 20-30% charge, shows percentage spikes or quickly discharges, the problem lies in the desynchronization of these batteries with the system.
Battery calibration is the process of resetting power controller statistics that helps restore accurate charge readings. Unlike myths, it does not restore the physical capacity of the battery, but eliminates software errors that interfere with proper operation. In this article, we will discuss 3 working methods of calibration (including manual reset through recovery), learn how to check the actual wear of the battery and give recommendations for extending its life.
Why the Redmi 5 Plus Battery Lies: Symptoms and Causes
Before calibrating, it is important to make sure that the problem is a software failure, not a physical wear and tear of the battery.
- 🔋 The smartphone turns off at 15-40% of the charge, although previously worked up to 5-10%.
- 📉 Charge percentages “jump” (e.g., from 50% immediately to 30% after rebooting).
- ⚡ After switching off the charging level drops by 5-10% in a few minutes.
- 🔄 When connecting to the network, charging begins only after several attempts.
The main reasons for such failures are:
- 🖥️ Power controller errors – the chip responsible for monitoring the charge loses synchronization with the real state of the battery.
- 📱 Failures after update MIUI — New firmware versions sometimes reset calibration data.
- 🔌 Incorrect charging: using left-hand adapters or frequent cycle interruptions (e.g. charging up to 80% and shutting down).
- 🕒 Natural wear: after 500-800 cycles, battery capacity drops by 20-30%, and calibration will not help.
⚠️ Warning: If the battery is swelled or deformed, calibration is prohibited. Replace the battery immediately: risk of short circuit and fire!
Method 1: Software calibration via battery menu (no root)
The simplest method that works on the Redmi 5 Plus with any version of MIUI (including MIUI 12/13/14) is suitable for minor reading failures.
Instructions:
- Charge your phone to 100% (use the original 5V/2A adapter).
- Turn off the charging and turn off the smartphone.
- Connect the charger of the phone turned off and wait for the green indicator (signaling a full charge).
- Turn on the device, go to Settings → Battery.
- Slap the icon. ⚙️ («Battery settings») → Select Reset Battery Statistics.
- Confirm the action and restart the device.
After restarting, discharge the phone until it automatically shuts down (don't turn it on until it's completely discharged!) Then charge to 100% without interruption. Calibration cycle complete.
Use the original Xiaomi adapter|Charge to 100% and wait for the green indicator|Reset statistics in battery settings|Discharge before switching off without switching on|Repeat charging to 100% without interruption-->
⚠️ Note: If after calibration the phone still turns off at 20-30%, the problem is battery wear (see "How to check real capacity»).
Method 2: Calibration through Recovery (for power users)
This method resets the controller data at the firmware level and is effective in case of serious failures. It is suitable for Redmi 5 Plus with unlocked bootloader (does not require root).
Step-by-step:
- Turn off the phone.
- Press the Power + Volume buttons up at the same time to enter Recovery.
- From the menu, select Advanced → Wipe Battery Stats (on some versions of Wipe battery data).
- Confirm the action and restart (Reboot).
- After activation, perform a full discharge-charging cycle (as in Method 1).
If your Recovery does not have Wipe Battery Stats, use an alternative method:
1. Install a reset file patch via TWRP (e.g., Battery Calibration Zip).
2. Sweat it like a regular ZIP through Install → Select a file → Swipe to Confirm Flash.
3. Reboot and complete the charging cycle.What happens if Recovery does not open?
Method 3: Manual calibration through the engineering menu (for advanced)
For users who are ready to work with engineering codes, there is a method of fine-tuning the controller, which requires input of commands through Engineer Mode.
Instructions:
- Open the Phone app and enter the combination: ##4636##.
- In the menu that opens, select the Information Battery (or Battery).
- Note the Battery level parameter – it should match the percentages in the status bar.
- If the data differs, enter the command (root required) in the engineering menu: echo 1 > /sys/class/power_supply/battery/reset_capacity
- Reboot your phone and complete the discharge-charging cycle.
For smartphones without root, an alternative way is to use applications like AccuBattery (showing real capacity and helping to calibrate data through log files).
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If the engineering menu doesn't open, try the combination ##3644633## (for some versions of MIUI).
How to check the real capacity of the Redmi 5 Plus battery
Calibration is useless if the battery is physically worn out. To find out the actual capacity, use one of these solutions:
| Method | precision | Instructions |
|---|---|---|
| AccuBattery (Play Market) | Tall. | Install the app, charge the phone to 100% and use it until it's discharged, and in the Health section, you'll see the actual capacity. |
| ADB (for PC) | Maximum | Connect your phone to your PC, type the command: adb shell dumpsys battery Look for the lines of capacity and voltage. |
| Test through Recovery | Medium | In TWRP, select Advanced → Battery Monitor and display the current capacity in mAh. |
The following are the normal results for Redmi 5 Plus:
- 🔋 New battery: 3900-4100 mAh (depending on the batch).
- 📉 Permissible wear: up to 3000 mAh (≈75% of the original).
- ⚠️ Critical wear: below 2500 mAh - replacement required.
💡
If the actual capacity is below 2800 mAh, the calibration will not help - the battery needs to be changed.
Frequent calibration errors and how to avoid them
Many users make critical errors that cause calibration to fail, and consider the most common:
- ❌ Use of unoriginal charger – adapters with inappropriate current (1A instead 2A) distort the controller data.
- ❌ Breaking the charging cycle – if you disconnect your phone from the network by 50%, the calibration will reset.
- ❌ Calibration on cold/hot battery – optimum temperature: 15–35°C.
- ❌ Ignoring physical wear – if the battery is swollen or the capacity has fallen below 60%, calibration is useless.
How to avoid mistakes:
- ✅ Use only the original Xiaomi adapter (or Quick Charge 3.0 certified).
- ✅ Charge your phone in airplane mode – this speeds up the process and reduces the load.
- ✅ Before calibration, let the battery cool down (if it is hot after games or the navigator).
- ✅ After resetting statistics, do not turn on the phone until it is completely discharged.
How to extend battery life after calibration
Calibration will have a temporary effect if you do not monitor the mode of operation.
- 🔌 Charging: Keep the level between 20% and 80% – this reduces the load on the cells.
- 🌡️ Temperature: Avoid overheating (do not play heavy games on charging) and hypothermia (do not leave your phone in the cold).
- 📵 Background Processes: Turn off application auto-update and geolocation to save energy.
- 🔄 Updates: Install the latest versions MIUI — They optimized the algorithms of power management.
Additional advice:
- 🛌 Night charging: If you leave your phone overnight, use smart sockets with a shutdown timer (to keep you from holding 100% for 8 hours).
- 📊 Monitor: Check the battery health once a month through AccuBattery or ADB.
- 🔋 Storage: If you don’t use your phone for long, discharge it to 40-50% and store it in a cool place.
💡
In MIUI settings, enable Battery Savings (Battery → Modes) to limit background activity and increase your battery life by 10-15%.