The battery is one of the most vulnerable components of Xiaomiβs smartphone, which loses capacity over time and needs to be replaced. Many users notice that the device has become faster to discharge, but do not know how to objectively assess the state of the battery. In this article, we will examine all the available ways to check the battery without root rights and third-party applications, from standard settings to hidden engineering menus.
Itβs important to understand that even new Redmi, POCO or Mi smartphones can have factory-faulted batteries, and after 2-3 years of use wear reaches 20-30%. We will show you how to get accurate data on charging cycles, current capacity and temperature, and explain which indicators are considered critical to replace. All methods are tested on MIUI 12-14 firmware and are relevant for models 2019-2026.
1. Standard method: The battery status menu in MIUI
The easiest method is to use the built-in battery utility and performance that is available on all Xiaomi smartphones with MIUI 12 and later. This section shows basic information, but it is enough for initial diagnosis.
To open the menu:
- Go to Settings β Battery and Performance.
- Slap the gear icon (βοΈ) top-right.
- Select the battery status.
Here you will see three key parameters:
- π Current capacity is the actual battery capacity in mAh (e.g, 4800/5000 mh means 4% wear).
- π Number of charging cycles β the more, the more severe the degradation (norm: up to 500 cycles).
- π‘οΈ Temperature - optimal range: 20-40Β°C. Exceeding 45Β°C critically!
β οΈ Note: If the battery status section displays a message "No data can be obtained", then your Xiaomi model blocks access to this information.
2. Hidden Engineering Menu (#4636##) - Advanced Diagnostics
The ##4636## Engineering Menu provides detailed battery information that standard settings donβt show, which works on most Xiaomi devices but can be blocked on some firmware (e.g. global MIUI versions for Europe).
Instructions:
- Open the Phone app.
- Enter the combination ##4636## (without call confirmation).
- In the menu that opens, select Battery Information.
In this section, pay attention to:
- π Level - current charge in percentage (must coincide with the indicator in the status bar).
- β‘ Voltage - voltage in mV (normal: 3700-4200 ΞΌ 100% charge).
- π₯ Temperature - temperature in degrees Celsius (critically if the temperature is > 45Β°C in normal use).
- π Health - battery status (ideal: Good; Unknown means data is not available).
Level indicator (must coincide with the charge indicator)
Voltage (3700-4200 mV at 100%)
Temperature (not higher than 45Β°C)
Health status (should be good)
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Critical: If the Health option is displayed as Unknown or Dead, it means that the battery controller is not responding - a diagnosis is required at the service center.
Codes for battery testing (alternative combinations)
If standard code ##4636## doesn't work, try alternative combinations. These may vary depending on the model and the firmware region. Importantly, some codes may reset or run tests, so use them carefully.
| Code. | Description | Applicability |
|---|---|---|
| ##284## | Battery test (shows voltage, temperature, status) | Redmi Note 10/11, POCO X3/X4 |
| ##6484## | Hardware inspection (includes battery test) | Mi 11, Mi 12 |
| ##64663## | Menu testing hardware components | Older models (Redmi 9, Mi A3) |
| ##36446337## | Information about battery and charger | POCO F3, Redmi K40 |
β οΈ Attention: Code ##7378423## (##SERVICE##) On some models, Xiaomi is running a full hardware test that could lead to a device reboot!
4. Battery monitoring applications: AccuBattery and AIDA64
If the built-in MIUI tools don't provide enough data, you can use third-party applications that analyze battery status based on the system logs and provide graphs of wear, temperature and discharge rate.
Top.-2 apps:
- π± AccuBattery (free, premium): Shows real battery capacity (compared to passport capacity); tracks charging cycles and predicts lifespan; makes recommendations for optimal charging (e.g., not keeping it at 100%).
- π AIDA64 (Fee version: Shows accurate data of the battery controller (voltage, temperature, technology); Displays information about the charger (power, protocol); Supports export of logs for analysis.
How to use AccuBattery:
- Install the app from Google Play.
- Charge the phone to 100% and wait for calibration (may take 1-2 cycles).
- Go to the Health tab β here will be a graph of wear.
π‘
If the AccuBattery shows the capacity for 20-30% I'm down below the passport, but the phone's working fine, maybe the app hasn't been calibrated yet. 3-5 Full charging cycles for accurate data.
5. How to interpret indicators: normal and critical condition
Once you get the battery data, itβs important to evaluate it correctly, and the following are the guidelines for Xiaomiβs lithium polymer batteries (all models use similar technology).
| Parameter | Norma. | Warning | Critically. |
|---|---|---|---|
| Capacity (from passport) | 90-100% | 70-89% | < 70% |
| Number of cycles | < 300 | 300-500 | > 500 |
| Temperature (when charging) | < 40Β°C | 40-45Β°C | > 45Β°C |
| Voltage (at 100% charge) | 4.2-4.3 Including | 4.3-4.4 Including | > 4.4 V |
Examples of interpretation:
- π If the tank drops to 75% (for example, 3750/5000 mAh), battery worn out on 25%. This means that when you are fully charged, you will only get 75% It's a time of first work, and at this point, you should think about replacing it.
- π₯ Temperature above 45Β°C in normal use (not in games!) indicates a faulty controller or damage to the battery cells!
- β‘ A voltage above 4.4 V at 100% charge indicates that the charger or battery controller does not limit voltage.
What to do if the battery is blown?
6. Frequent errors in battery inspection and how to avoid them
Many users make mistakes in diagnosing the battery, leading to incorrect conclusions, and the most common ones are:
- π Check immediately after charging: Battery voltage and temperature elevated during 30-60 Just let the phone cool down before the test.
- π Ignoring calibration: If you have never discharged your phone before 0%, The controller may display inaccurate data. 2-3 Allow full discharge (before shutting down).
- π Use of non-original chargers: Cheap chargers can deliver the wrong voltage, which distorts the performance in the engineering menu.
- π± Comparison with other models: Capacity of 4000 mAh on the Redmi Note 10 and POCO X3 It does not mean the same time β optimization is important. MIUI hardware-platform.
β οΈ Warning: Some of the Google Play battery optimizers promise to "restore capacity" or "reset charging cycles." That's a scam! Battery capacity is a physical parameter, and it can only be returned to its original state by replacing the battery.
7.How to extend the life of the battery on Xiaomi: practical tips
Even if your battery is still in good condition, following a few rules will help delay replacement by 1-2 years, based on the specifications of lithium polymer batteries and tests from Xiaomiβs lab.
- π Avoid total discharge and 100% charge: Optimal range β 20-80%. Continuous charging until 100% precipitate.
- π‘οΈ Control temperature: Do not leave your phone in the sun or near heat sources. > 30Β°C damages the battery.
- β‘ Use Original Chargers: Fast Charge is Safe Only with Xiaomi Certified Adapters.
- π΅ Disable unnecessary functions: 5G, GPS, NFC Background synchronization increases the load on the battery.
- π Update the firmware: In new versions MIUI often optimizes energy consumption (e.g., in the MIUI 14 Added Ultra Battery Saver Mode).
π‘
The most harmful scenario for the battery is to play heavy games (such as Genshin Impact or Call of Duty) when charging. The temperature can exceed 50 Β° C, which reduces the battery life by 2-3 times.