For those looking to add wireless connectivity to embedded projects or to build IoT devices, the ESP32 is arguably the most popular choice. It offers a dual-core option for processor intensive applications, while built-in WiFi and Bluetooth simplify designs. It also has plenty of I/O, memory, and interoperability to meet the needs of most applications.

In this comprehensive guide, we‘ll explore how to power the versatile ESP32 microcontroller using batteries for wireless, portable applications.

You may be wondering:

What battery chemistry provides the ideal voltage?

How long will different capacities last for my use case?

What‘s the best way to connect a battery to ESP32?

How can I optimize my ESP32‘s code for better battery life?

We‘ll cover guidelines for selecting the right battery type and capacity, wiring configurations, power management best practices, and real-world examples. Let‘s get started!