Patent ID: 7909478

Claim:
A portable lighting device, comprising: a generally cylindrical body having a battery compartment, the battery compartment comprising a first sub-compartment sized to receive a first battery of a first size and a second sub-compartment sized to receive a second battery of a second size, wherein the second size is different than the first size and wherein when either the first battery or the second battery is provided within the battery compartment, the other of either the first battery or the second battery is prevented from also being provided within the battery compartment; a contact assembly provided at an end of the body and comprising a first contact surface and a second contact surface different than the first contact surface, the contact assembly further comprising an electrical contact common to the first contact surface and the second contact surface; a light source coupled to the body; and a circuit coupled to the light source and adapted to provide a current from either the first battery or the second battery to the light source.