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When Should You Replace Your Old Phone's Battery? These Signs Indicate It's Time
Siddhi Jain | February 8, 2026 4:15 PM CST

If your phone's battery drains in just a few hours or the phone suddenly shuts off, these are signs that it's time to replace the battery. Battery replacement can help you avoid these problems.

After a few years of use, smartphones often start experiencing battery issues. The battery drains quickly, even with minimal use, and in many cases, the phone shuts down unexpectedly. This means you have to carry a power bank with you even for short trips outside the house. Battery replacement can solve this problem. Today, we'll tell you what signs indicate that you should consider replacing your phone's battery.

Here are the signs that indicate you need a battery replacement:

Slow Apps - If the apps installed on your phone are taking a long time to open, and the phone's animations aren't working properly even after a full charge, it indicates that the phone's battery is not delivering a stable voltage.

Sudden Battery Drain - If you leave home with a fully charged phone, but the battery drains by more than half by the time you reach the office or college, it means the battery's capacity has degraded, and replacing it is the only option.

Sudden Phone Shutdown - If your phone suddenly shuts down even when there's 20-30 percent charge remaining, it shows that the battery is weak and its voltage is dropping suddenly. Therefore, battery replacement is the only solution.

Overheating or Swelling - If your phone overheats during basic functions like charging or calling, or if the battery swells, replacing the battery is a safe option. Both overheating and swelling can be dangerous for your phone and for you. If you notice any of these signs, replace your phone's battery immediately.


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