A power management system for a scanner device comprises an onboard power source and an interface port adapted to receive power from a remote host. This back-pointer item can be used to jump to the beginning of the data container when reading the file backwards. A portion of memory is allocated for a data structure that is an interface for handing off system component information. The authorizing authority receives the payment and transaction information, authorizes or declines the payment of the transaction, and forwards the authorization or declination to the automobile wallet application. One or more strain gauges, or a strain gauge assembly, is interconnected with the second expansion joint. Other aspects are provided herein.