The battery disconnection problem applies to Jaguar's which are 1996 model and newer. 1996 and newer vehicles are equipped with an OBD II (On Board Diagnostic 2nd Generation) system that the smog machine connects to which collects "emission monitor" data. Emission monitor data which are called "readiness flags" are erased whenever the battery is disconnected or needs recharging.
1995 & older vehicles are equipped with OBD I computer systems which do not collect or test for emission monitors. These vehicles only require 30 minutes of driving and only if the vehicle is equipped with adaptive fuel and air mixtures strategies.
