Patent ID: 7390590

Claim:
A battery storage case including a main body having a first opening portion at one end of said main body and a bottom surface at an opposing end, and a lid portion having a second opening portion at one end of said lid portion and a head portion at an opposing end, said battery storage case comprising: a first projection train formed on an outer surface of said main body near said first opening portion; a second projection train formed on an outer surface of said main body near said bottom surface; and one or more annular projection rows formed around an inner surface of said lid portion, wherein the one or more annular projection rows are adapted to engage one of the first projection train and the second projection train, wherein, a through-hole is formed through the head portion of said lid portion, the main body is capable of storing two batteries when the one or more annular projection rows engage the second projection train and storing one battery when the one or more annular projection rows engage the first projection train, and the outer surface of the main body is elastically inwardly deformed and the lid portion is elastically outwardly deformed when the first projection train and the second projection train contact the one or more annular projection rows during an insertion and an extraction of the main body into or out of the lid portion in a lengthwise direction without requiring a rotation of the main body relatively to the lid portion.