Yes, two AA batteries at 1.5v each would equal only 3 volts when connected in series. The Arduino needs 5v so [AI] decided to use a MAX756 DC-to-DC step-up regulator to maintain a steady stream of 5v.

DIY Arduino Nano multimeter with LiPo battery, charger and more. 10:59 am February 13, 2019 By Julian Horsey.

The Qduino Mini embedded processor board which made its debut on Kickstarter earlier this week will make it easier than ever for Arduino enthusiasts to design and build compact, battery-powered ...

A new Arduino is joining the devboard lineup. Welcome the MKR1000, and yes there's an IoT focus. According to the Arduino team it's a board that combines the functionality of the Zero and the ...

Arduino Measures Remaining Battery Power With Zero Components, No I/O Pin. 22 Comments . by: ... but he provides example Arduino code showing how handy this can be for battery-powered projects.