A disposable-type flashlight comprises a hollow, flexible case having cap enclosed ends. Within the rear cap is a conductive pressure plate having a flat W-like configuration. Inner apexes of the pressure plate engage a positively charged end of an insulated battery and a negatively charged end of an...http://www.google.ca/patents/US4819140?utm_source=gb-gplus-sharePatent US4819140 - Compressible flashlight
