Ford has a patent out on a removable bed box that contains a range extender. Looks like it's not just a defensive patent either; they have been spotted testing

Ford has a patent out on a removable bed box that contains a range extender. Looks like it's not just a defensive patent either; they have been spotted testing something very similar. With a big battery capable of providing extra juice when climbing long hills or accelerating they should be able to put a fairly small engine in and always run it at peak efficiency. Especially if they can be rented from a dealer it would really takes care of the casual truck user's needs. I have a buddy who daily drives his F-150 to work and then a couple times a year tows a big camper long distance for family vacations. His daily needs could easily be electric and he could rent an extender for 3 or 4 weeks a year to tow with. It would still slash his annual fuel consumption and as biodiesel or other synthetic fuel becomes available/reasonably practical even with a big truck his carbon emissions would be very low (it does help the grid here in Ontario is extremely clean already)