I'm trying to build a battery operated hand lantern. It has the Arduino, an MPU6050 accelerometer, and 4 APA106 (WS2812B-like) LEDs.
If I'm using 5x AA batteries for 7.5V (at full charge) that should be 2.5V * 325mA of power wasted or just under a watt that'll be heating up the regulator? I'm not sure if that's huge or tiny or in between or what.
What's the most sane way to power this device for an absolute newbie?