AFS Trinity Power has developed two fully operational XH-150 SUV prototypes using off-the-shelf components that make it possible for plug-in hybrid electric vehicles to achieve 150 MPG, go 40 miles in all-electric mode, and use gasoline for additional unlimited miles in hybrid mode. The low-cost lithium batteries -- protected from excessive resistive heating by the ultracapacitors -- will make the XH-150 much less expensive to purchase.