It's a frustrating feeling: you buy a fantastic smartphone, but as the months go by, you notice the battery life plummeting , and you can't make it through the day without your charger nearby. Don't worry, it's perfectly normal; lithium-ion batteries undergo an inevitable chemical degradation process that, sooner or later, reduces their energy storage capacity.
If you feel like your device has become like a "landline phone" because it always needs to be plugged in, you most likely need to replace the power supply . However, before rushing to a repair shop and spending money, it's crucial to analyze whether the problem is with the hardware or if there's a software bug consuming resources in the background.
How do you know if you really need to change the battery?
Don't rely solely on intuition. The smartest thing to do is to perform an accurate battery health check . If you have an iPhone, the process is very simple: go to Settings, tap Battery, and check Battery Health. If the percentage has dropped below 80%, Apple considers that the battery is no longer performing at its best and recommends replacing it.
For Android users, things are a bit more varied since not all manufacturers include this option by default. In this case, the best solution is to install third-party apps like Ampere or learn how to view charge cycles and battery health to get a detailed report on its performance.
Physical signs and faults you shouldn't ignore
Sometimes, the battery warns us that it's nearing the end of its life through more obvious symptoms than simply reduced battery life. One of the most dangerous is battery swelling , which can cause the screen to detach or the phone to no longer sit flat on a table. If you notice this, stop using the phone immediately and take it in for repair, as there is a real risk of fire or serious damage to the motherboard.
Other clear signs include unexpected shutdowns when you still have 20% or 30% charge remaining, or the device restarting on its own. This happens because the degraded battery can't supply a stable voltage to the processor, causing the system to freeze or shut down to prevent damage. Similarly, if you notice the screen brightness suddenly dropping or the phone becoming much slower, it could be the operating system limiting power to compensate for the battery's poor condition.
Quick solutions before you check out
Before spending money, try to rule out a software problem. Sometimes, a poorly optimized application or a system bug can drain your energy. The first thing to do is check that you have the latest software version installed , as updates often include energy efficiency improvements.
If your phone's battery life is still short after updating, you can try restoring it to factory settings or analyzing background battery usage and how to manage it . A full factory reset will clean junk files and corrupted processes that might be draining the battery. Remember to back up your data beforehand, as this process will erase all the content on your internal storage.
Where to go for repairs: Official or third party?
If you're certain your battery is dead, you have two options. An authorized service center is the safest choice; although they tend to be more expensive, they guarantee the use of original parts and maintain the device's water resistance (especially important if your phone is water-resistant). They also usually offer a more robust post-repair warranty.
On the other hand, unauthorized repair services are attractive because of their speed and lower prices. They're ideal if you have an older phone or are on a tight budget, but you should be careful. Make sure to ask if the part is original or compatible and what kind of warranty they offer , as some cheap batteries can have a very short lifespan or even overheat.
Cost analysis: How much does the change cost?
In the case of iPhones, prices vary depending on the generation. Older models can cost around €55, while newer models, such as the iPhone 16 Pro Max , can reach up to €135 at official service centers. Generally, most mid-range models are around €99.
In the Android ecosystem, prices tend to be more competitive. Brands like Xiaomi offer very affordable upgrades , with some Redmi models costing as little as €10 and high-end models under €32. Other brands like Samsung, Google Pixel, and OPPO typically operate within a wider range, generally between €50 and €120 depending on the complexity of the assembly and the specific model.
Tips to make your new battery last longer
Once your phone is like new again, avoid repeating the same mistakes. To extend its lifespan, try to avoid complete discharges (don't let it reach 0%) and consider limiting charging to 80% to protect the battery . Avoid charging the device to 100% for extended periods, as chemical stress is greater at these extremes. Ideally, keep the charge between 20% and 80%.
Heat is electronics' worst enemy. Avoid leaving your phone in the sun or exposing it to temperatures above 35 degrees Celsius , as this accelerates the degradation of internal components. Also, always use certified or original chargers to avoid voltage spikes that could damage the new battery.
Steps prior to repair and ecology
Just before handing your phone over to the repair shop, it's vital to back it up to the cloud (iCloud for iOS or Google for Android). Although a battery replacement doesn't require deleting data, the technician might need to restore the system to optimize the new part, and you don't want to lose your photos and contacts.
Finally, think about the planet. Batteries contain toxic materials that shouldn't end up in the regular trash. Make sure the repair service recycles the old battery at a recycling center or specialized facility to reduce the environmental impact of this chemical waste.
Knowing when to replace your battery, whether due to low health, swelling, or sudden shutdowns, can extend the life of your smartphone by several years. By comparing costs between official service centers and independent repair shops, and by adopting good charging and heat protection practices, you can keep your device running smoothly and efficiently without having to buy a new phone every two years.
