Why Phone Batteries Don’t Last Forever (And When to Replace Yours)

Smartphone batteries are one of the most used and most stressed components in your device. Every time you charge your phone, the battery goes through what’s called a “charge cycle.” Over time, these cycles reduce the battery’s ability to hold power efficiently.

Most modern smartphone batteries are designed to last between 300–500 full charge cycles, which typically equals about 2–3 years of average use. After that, you may notice your phone draining quickly, shutting down at 20–30%, overheating while charging, or taking longer to power up.

Many people assume their phone is “getting old” when it slows down, but in many cases, a worn battery is the real issue. A fresh battery can significantly improve performance, restore battery life, and extend your device’s lifespan without the cost of buying a new phone.

Replacing a battery is often one of the most affordable repairs — and it’s a smart investment before upgrading your device.