Battery Check-..---This camera is designed for use witheither silver oxide or alkaline batteries.Although both types offer adequateperformance, silver oxide batterieslast much longerIMPORTANT. When using the PDPrism Finder, make it a point to usesilver oxide batteries when available(in this instance, battery life is short-ened if alkaline batteries are used)When the battery check button (21,located above the film advance knob)is depressed, the battery check lamp(8, located above the shutter speeddial) illuminates. If the battery checklamp fails to go on, it is time to replacethe battery .* When the battery is completely ex-hausted, the opened shutter will notclose. At this time, if the battery checkbutton is pushed all the way down asfar as it will go, the shutter will thenclose.22