We checked the 150 MPG Toyota Prius at the Clean Vehicle Technology Expo in Ontario California. There were a lot of pure electric cars and hybrid cars there, some in early concept stages, other (pre)production. But Hymotion's new lithium-ion battery pack for the Toyota Prius really got our attention. While it may not lower gas prices, it does promise to make trips to the gas station a lot less frequent.

The 175-pound battery pack, which is sold as after market kit, converts the car into a plug-in hybrid and allows it to run on electric power for the first forty miles of a trip. It installs in the spare tire well of the trunk, leaving the entire trunk space for cargo, so you can still drive your spare tire in there, and have plenty room left. In average Prius, the gasoline engine still does the majority of the work and the ..

Source: lithium ion battery pack