If your iPhone battery drains quickly, it does not always mean the phone is faulty. Battery performance naturally declines over time, especially after hundreds of charge cycles. High screen brightness, background apps, and constant notifications can also significantly reduce battery life.

iOS updates may sometimes increase power usage temporarily while background processes complete. Checking battery health in settings can help determine whether a replacement is needed. When battery capacity drops too low, replacing the battery is the most effective way to restore normal usage.