If you’re planning to sell your old phone, checking the battery health before selling is an important step. Battery condition can affect the phone’s performance, buyer confidence, and ultimately its resale value.

A phone with a healthy battery is generally more attractive to buyers than one that needs frequent charging or has noticeable battery degradation.

The good news is that checking battery health is usually simple. In this guide, we’ll explain how to check battery health on iPhone and Android phones, what the numbers mean, and what you should do before selling your device.

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