Battery holders come in all sorts of shapes and varieties. These 2 x “AA” battery holders are a bit interesting because they have PC pins (for soldering into circuit boards) rather than the standard wire leads you see on most. The nice thing about these PC Pins is that they happen to work quite well in Solderless Breadboards and Perfboards / Protoboards. No more wire running to your battery case!

The batteries are connected in series, so the output voltage from this 2 x “AA” battery case would be approximately 3VDC.