No factory parts or components will be replaced or taken out of the vehicle, the plug-and-play PHEV system engineered by Hymotion can boost the electric capacity of a vehicle by 7 times, making the extra range for all electric “stealth” mode. And since the whole system, which includes the smart charger, power electronic and battery, is smaller and lighter than factory NiMh battery box. This is made possible by A123Systems' proprietary Nanophosphate™ lithium ion battery technology that Hymotion employs in their plug-and-play PHEV system, and does not require a trunk full of batteries to achieve such efficiency and performance.
Hymotion currently has systems available for Toyota Prius, Ford Escape Hybrid and Mercury Mariner Hybrid. More systems are under development for Lexus RX400h, Toyota Highlander Hybrid and Toyota Camry Hybrid.
http://www.hymotion.com/index.htm