Adapter permitting smaller size battery cell to function in larger size applications

An adapter for permitting a first standard size battery to be used in place of a second, larger standard size battery, comprising:

• a tubular means of a diameter and length substantially equal to the diameter and length of the second, larger standard size battery;
• an opening in one end of said tubular means of a diameter larger than the diameter of the first standard size battery;
• support means arranged inside said tubular means for defining an imaginary cylinder smaller in diameter than the cylinder presented by the first standard size battery;
• stop means arranged inside said tubular means at a distance from said one end equal to the length of the first standard size battery, said stop means having a slot formed therein of a size less than the size of the end of the first size battery;
• disc-shaped, metallic electrical contact means arranged in the second end of said tubular means for presenting an electrical contact surface substantially coplanar with said second end of said tubular means and having a resilient contact means comprising a centrally arranged upraised curved strip formed from said disc for protruding through said slot in said stop means for making electrical contact with an end of the first size battery, whereby upon inserting the first size battery into said opening for a distance to abut said stop means, the combination can be used in place of the second larger size battery.