A123 Systems has created a Web site where Toyota Prius owners can preorder a battery to convert their cars to plug-in hybrids capable of getting well over 100 miles per gallon.
The switch from hybrid to plug-in hybrid doesn't come cheap, though. The battery and installation costs $9,995, plus an extra $400 "destination fee" and taxes.
The battery, called Hymotion 5, is designed to fit into the spare tire slot underneath the trunk of Prius model years 2004 to 2008. The company didn't say when the batteries would be available.
A123 Systems said the extended-life … Read more