Knowing the status of a mobile phone's battery is essential to ensure proper functioning and a long lifespan for your device. Battery degradation can have significant consequences: overheating, rapid discharge, loss of battery life, and unexpected shutdowns. Monitoring its status helps you anticipate potential failures or the need for replacement. Furthermore, being aware of the health of this critical component is key to keeping your phone operational for years to come and avoiding unfortunate surprises.
In today's smartphones, the battery is integrated and physically accessible, unlike older models with removable batteries. Therefore, it's crucial to use internal testing methods, system diagnostics, specialized apps, and some secret codes provided by the manufacturers, which allow you to accurately determine the battery's actual condition.
In this article, we have gathered absolutely All the updated and verified ways to check your battery status for both Android and iPhone, including tips, recommended apps for each platform, codes, native sections, signs of deterioration, tips to extend battery life, common myths, technical details, and recommendations for deciding when to replace your battery. With this guide, you'll have a comprehensive and practical overview to take the best care of your device and know at all times if your battery is healthy or needs attention.
Why is it so important to know the status of your mobile phone battery?
The battery is at the heart of the user experience of any mobile phone. Without power, absolutely all functions are rendered useless. Progressive battery degradation is completely natural due to the passage of time, the number of charge cycles, and the type of use we give the device. Knowing its status allows you to:
- Detect possible damage before the phone becomes unusable: Noticing symptoms such as rapid discharges or unexpected shutdowns is a sign that it is worth analyzing the battery status.
- Optimize resale valueIf you're selling your smartphone, knowing and displaying its battery health can increase its value on the secondhand market and boost buyer confidence.
- Deciding between repairing, replacing, or renewing your phone: : often changing the battery is enough to revitalize a mobile phone, saving the cost of replacing the entire device.
- Prevent security risksA faulty battery can swell, overheat, and even be dangerous. Identifying these problems early can prevent accidents.
Additionally, on some models you can get detailed information such as charge cycles, maximum remaining capacity in mAh, voltage, temperature, and possible deterioration trends.
What does battery health mean and how is it measured?
When we talk about battery health We're referring to how much the battery has degraded compared to its initial factory capacity. In most cases, it's shown as a percentage: 100% is equivalent to a new battery, and as it's used and aged, the actual capacity decreases. For example, if a device started with a 5.000 mAh battery and after two years only retains 2 mAh, its health would be 4.000%.
The main causes of this aging are charge/discharge cycles (one cycle is equivalent to consuming 100% of the capacity, even if it is in several batches), high temperatures, frequent rapid charging, leaving the device connected for many hours or exposing it to full charges and deep discharges repeatedly.
A battery health level below 80% is usually the threshold at which it is recommended to consider replacing the battery, as the negative symptoms become increasingly evident: reduced autonomy, increased overheating, risk of rapid shutdowns, or simply the inability to complete the day on a single charge. Experts estimate the average battery lifespan to be between 300 and 500 full charge cycles.
Ways to check the battery status on Android
- Android internal settings: Some devices allow you to view battery and health information from the settings menus, although the depth and accuracy of the information varies by make and model.
- Secret diagnostic codes: : Sequences can be entered into the calling app that unlock hidden menus with battery data.
- Specialized external applicationsApps like AccuBattery, CPU-Z, Ampere, DevCheck, Electron, and others offer detailed reports on health, cycle times, and statistics. If you want to dig deeper into this topic, you can check out how to tell if your Xiaomi's battery is charging. this link.
- Exclusive tools by manufacturerSome OEMs like Samsung and Xiaomi include native apps or paths to view battery health and other technical information.
View battery status from Android Settings
The easiest and most accessible method is to go to Settings or System Settings. However, Not all Android versions or brands display advanced details about battery health. In general, the steps would be:
- Accede to Settings o Configuration on your phone.
- Look for the section Battery o Battery and device care (name may vary by brand).
- In some cases, you will find a section called Battery health o Battery infoIf a percentage, a rating (Excellent, Good, Fair), or technical data appears, please review them.
On most current phones, information is often limited to app usage, screen-on time, and power-saving suggestions, and an exact health figure is rarely provided. Customization layers (such as Samsung One UI, Xiaomi MIUI/HyperOS, OPPO ColorOS, etc.) can offer additional options and features.
Diagnostics with Android secret codes
Android incorporates hidden codes with access to advanced diagnostic features. The most commonly used to view battery health is * # * # * # * # 4636. To use it:
- Open the Phone app as if you were going to make a conventional call.
- Enter the code * # * # * # * # 4636 and wait a few seconds.
- A menu called will appear on the screen Testing, with several sections. Look for the option of Battery info or similar.
- Data such as status (Good/OK), voltage, temperature and charge level are displayed here.
Warning: This access doesn't work on all phones, as some manufacturers disable these menus for security or customization reasons.
Specialized apps for monitoring the battery on Android
When native methods are insufficient, the best solution is to use external applications that analyze and monitor battery health with great precision. Below is a selection of the most recommended and reliable:
- AccuBattery: Very popular and free, it displays battery health percentage, cycles, estimated capacity in mAh, charging and discharging speed, temperature, and alerts when an app is consuming too much or if the phone is getting dangerously hot. It requires several cycles to calibrate accurately. If you want to learn how to improve your phone's performance, you can also check out Tips to extend battery life.
- CPU-Z: Allows you to consult the section Battery to view the overall condition (“Good” means healthy), voltage, temperature, and other technical parameters. It indicates whether the battery is still within the manufacturer's specifications.
- DevCheck: It offers a battery tab with real-time health, level, capacity, voltage, and temperature. It's recommended if you're looking for advanced technical information and continuous monitoring, as well as detailed consumption statistics.
- Ampere: Specialized in measuring charging and discharging current. It indicates whether the phone is receiving adequate power from the charger, increasing control during charging. For tips and recommendations, don't hesitate to visit Tips to charge your Android device's battery faster.
- Electron: battery health info: With a modern and easy-to-use design, it analyzes temperature, health, cycles, charging speed, and very clear visual statistics.
- AIDA64: In addition to technical information about the phone, it allows you to see the status, temperature, voltage and discharge rate of the battery, although the health tab sometimes appears empty depending on the manufacturer.
- Device Info: A general-purpose app that collects system, CPU, and battery data, displaying the status in its dedicated tab, along with voltage, temperature, capacity, and whether the phone is charging.
For a complete diagnosis, it's best to perform several charging cycles and, if possible, compare the results between different applications, as access to internal data may vary by brand/model. A good option is also to visit How to control charging cycles on Android.
Advanced options according to the manufacturer
Some manufacturers integrate specialized tools or more precise native routes than generic Android itself.
- Samsung: Use the app Samsung Members, usually pre-installed. Go to “Support” (or “Help”), then “Phone Diagnostics,” and select “Battery Health.” The app classifies the battery status as “Good,” “Normal,” or “Weak” and allows you to run additional tests. If your phone displays a level below 75%, you might want to consider replacing the battery.
- Xiaomi, Redmi, Poco: Enter the code * # * # * # * # 6485 in the call app. A special menu will open where the indicator MB_06 shows the health (“Good” means good, low values imply significant wear). It also includes the data MF_02 with the exact number of charging cycles completed.
- OPPO, Realme, Vivo, OnePlus: : They may include routes in Settings under “Battery” or their own diagnostic applications, although the information provided varies by model and region.
Check battery cycles and what they mean
The charge cycle is one of the most important metrics for determining battery wear. A cycle corresponds to having consumed 100% of the battery's capacity, without having to do it all at once. Modern phones typically last between 300 and 500 complete cycles before falling below 80% of useful capacity.
Some apps and factory menus display the number of accumulated cycles. A high number of cycles (more than 500) indicates that the battery will no longer hold a charge as well as it used to. If the battery's health is detected as falling below 80%, it's advisable to consider replacing it.
How to know if your iPhone's battery is in good condition
Apple makes it very easy to analyze your battery status with a built-in feature in iOS. If you have an iPhone or iPad, you can check your battery health by following these steps:
- Accede to Settings on the iPhone.
- Select option Battery.
- Sign in Battery health and charging.
- Observe the percentage of Maximum capacityA value above 80% indicates good health.
- Check the Peak performanceIf it appears normal, the device has no restrictions due to battery status.
If the battery health drops below 80%, iOS recommends replacing it. You'll also see warnings if the battery is impacting performance or if intervention is necessary.
Apps to analyze the battery on iOS
- Battery Life: Allows you to view health percentages, cycles, capacity, voltage, and temperature. Includes a widget for home screen control.
- Ampere, Power Master: They analyze the consumption, charging speed, and technical parameters of the battery.
- Device Info Toolkit: Provides advanced information on complete and partial cycles, current status and actual capacity versus original.
- GSam Battery Monitor: Monitors power consumption by application, components, and displays graphs of history, temperature, and cycles.
Clear signs of a faulty or degraded battery
Apart from diagnostic tools, there are unequivocal symptoms of a bad battery:
- Much faster downloads than usual, even with little use.
- The device overheats in simple tasks or during charging.
- Unexpected shutdowns: The mobile turns off before reaching 0% or with high apparent battery levels.
- Charger dependency: Only works while plugged in.
- Physical swelling of the battery: the back cover is noticeably bulging (in this case, It is mandatory to replace it immediately, since there is a real danger to safety and the device may become unusable).
How long does a mobile phone battery last and when should it be changed?
The typical life expectancy is 2 to 3 years or the equivalent of 300-500 complete cycles, depending on usage, load type, temperature, and internal components. Manufacturers consider the battery's useful life to be complete when its capacity has been reduced by 20% compared to its original capacity.
Replacing the battery is usually enough to revitalize your phone and restore battery life. If you experience any of the common issues (sudden discharges, shutdowns, overheating, or having to charge it multiple times a day), consider replacing it with a genuine battery and visit an authorized service center if access is difficult.
Essential tips to extend battery life
- Avoid discharging the battery below 20% And don't let it charge to 100% all the time. The ideal range is between 20% and 80%.
- Always use original and certified chargers to avoid overloads or damaging voltage spikes.
- Avoid prolonged overheating And never charge your phone in direct sunlight or in very hot or cold environments. The optimal temperature is between 16 and 22 degrees Celsius.
- Don't leave your phone connected all night. unless your model integrates advanced load management.
- Activate battery saving modes when you don't need all the functions active (limiting brightness, disabling Bluetooth, WiFi, GPS and background apps).
- Update the operating system and apps; new versions include optimizations that extend battery life and reduce unnecessary power consumption.
- Don't install unnecessary apps that promise optimization: Most of them only force close apps and do not extend battery life.
- Monitor consumption in the background and uninstall apps that consume excessive power.
Myths and truths about the drums
Battery technology has come a long way, but some are still around. inaccurate myths:
- Is charging overnight bad? Modern cell phones tend to stop charging when they reach 100% and only resume charging briefly. If your phone is modern, the damage is minimal, although it is recommended to avoid it whenever possible. For more information, see Why it is not advisable to charge your mobile phone all night.
- Should I let my phone discharge to 0% and then charge it to 100%? No, this was only useful in older nickel-based batteries. Today's lithium batteries suffer less wear if kept between 20% and 80%.
- Does airplane mode speed up charging? It only reduces consumption during charging, it does not increase the amount of energy supplied.
- Can I change the battery myself? It's only recommended for models with removable batteries. If access requires opening the casing, it's best to consult a professional, as improper handling can damage the device.
What to do if the battery is swollen or damaged?
Battery swelling is the most dangerous symptom. If you notice that the casing seems bulging or the phone doesn't close properly, do not use the deviceKeep it away from flammable objects and seek immediate technical assistance for safe replacement. Swollen batteries release toxic gases and can explode if mishandled.
How to interpret the results obtained?
- Health between 90-100%: The battery is in optimal condition.
- Health between 80-89%: normal functioning, but wear is evident.
- Health between 70-79%: It is advisable to schedule the change, especially if you detect signs of poor performance.
- Below 70%: urgent replacement to avoid shutdowns or major damage.
Have a accurate diagnosis of battery health It's key to taking care of your device. With the tools and tips in this article, you can thoroughly monitor this essential component, anticipate potential failures, and improve your phone's lifespan. Keep your charges between 20% and 80%, use the right charger, monitor the temperature, and perform regular checks with recommended apps to ensure your smartphone keeps up with your daily routine without any unpleasant surprises.
