The current budget for an unpowered car is on the order of 20mA, and they're specced to leave the factory such that they can be left in that state and started a

The current budget for an unpowered car is on the order of 20mA, and they're specced to leave the factory such that they can be left in that state and started after a month. If you switch the alarm on, that budget increases to something like 120mA, but you'll kill the car inside a fortnight.