3 AA Battery holder

thingiverse

This is a holder designed specifically for 3 AA batteries. When alkaline and fully charged, these batteries produce approximately 4.2 volts. This component served as a reliable power supply for my ATMEGA328p-pu microcontroller, an Arduino variant. 4.2 volts proves sufficient to power any device requiring 5V via AAs; utilizing 4 AAs would provide excessive voltage, but delivering slightly under the required amount still functions effectively. Observe how to arrange batteries in series below in the post-printing section. Note: The central hole within this holder allows for wire passage if space is limited around it. This feature proved particularly useful in my setup, as evident from the attached image.