How do I know if I need a new battery for my phone?

Baseball2021 wrote:

How do I know when I need a new battery for my phone?

Go to Settings/Battery/Battery Health. You need a new battery if:

• The battery condition is under 80%

OR

• There is a message under “Peak Performance” that says the battery is degraded

It is kind of up to you how much you can tolerate frequently recharging your device. Apple provides guidelines about battery health here --> iPhone Battery and Performance - Apple Support That includes a message about when it thinks it necessary to change your battery.

When the battery health drops to 80%.