Electronic price label battery storage apparatus and replacement method

A electronic price label comprising:

• a housing;
• circuitry within the housing including a volatile memory;
• and
• a battery storage apparatus within the housing including
• a first electrical contact for simultaneously providing a first electrical path to first polarity sides of a plurality of batteries;
• a second electrical contact for simultaneously providing a second electrical path to second polarity sides of the plurality of the batteries;
• and
• a retainer which maintains at least a single one of the batteries in contact with the first and second electrical contacts during removal of a number of other batteries in order to maintain power to the memory including a tunnel on a rear surface of the housing containing the first and second electrical contacts, having a first end aperture through which a new battery is inserted, having a second end aperture through which an old battery is ejected during insertion of the new battery a first sliding door adjacent the first end aperture, a second sliding door adjacent the second end aperture, and a linking member joining the first and second sliding doors to facilitate substantially simultaneous closure of the first and second sliding doors.