Power supply with batteries

If you want to use your microelectronic project at different locations and be as independent as possible from common power sources, it is recommended to use a block battery or a battery tray. The block battery is connected to the microcontroller using a 9V block battery terminal. Just like most battery compartments, this has a 2.1mm connector that can be conveniently plugged into the controller. If the performance of the battery decreases, it can be replaced quickly and easily with a few simple steps. 
We recommend using a battery clamp or battery tray for projects that do not require constant monitoring or where a static power supply is not possible (for example, a chassis).