A closure device, particularly suitable to isolate a compartment (2) for batteries (3) suitable to power an electronic device (4), which is constituted by a cylindrical ring (6), with which a containment tray (8) for the batteries (3) is axially associated...

A battery box which can prevent a dry battery from being inserted in the battery box in an erroneous mode and thus avoid a short-circuit condition of the dry battery. To prevent a lateral face of the dry battery to be inserted in the battery box (1) from c...

The device is of standard size C or D and has up to four AAA or AA round cells (10) contained in a housing with external dimensions of C or D size consisting of at least two parts (21,22) forming an at least approximately cylindrical external profile and t...