There is apparently still a shortage of concrete information available to the service centers. But our SC have confirmed that the P85D upgrade does NOT include the battery upgrade, and in fact the battery upgrade is not going to be available at this time anyway. They made a statement that the P85D with ludicrous mode will have "comparable" acceleration to a P90D with ludicrous mode, but they are not able to qualify what comparable means yet. Either way I'm going to do this upgrade as it will essentially be a 10,000 option for nearly half the price (depending on labour). Ultimately I'm sure battery upgrades will become available if I want to fully release all of the ludicrous power.