This battery holder can fit 4 AA 1.5V batteries, providing a total of 6 Volts (for Alkaline batteries since some rechargeable batteries may have the same size but different voltage).
The cable tinned leads will connect easily into a breadboard or a screw-in power terminal, like the one included in SumoBots.
This unit comes by default in the SumoBot robotic kits so if you need a replacement for a 4 AA battery holder, this will be the right choice.