All iPhone batteries will eventually need to be replaced. Before you go on to buying a new device, consider the following strategies to recognize your iPhone is in need of a battery replacement.
There are a few ways to tell your iPhone battery is going bad. The most common symptom of a bad iPhone battery is fluctuating battery level. When your iPhone battery dies around 20-30% instead of going all the way down to 0, you need a new battery.
In another situation, the battery percentage will “jump” around, going from 90% to 50% or less after light use. But when it is plugged in, it comes back on at another percentage. This is another indicator your iPhone needs a battery replacement.
Many people go on to getting a new phone at that point. But before you spend hundreds to buy a new phone, consider having your iPhone battery replaced.