Related by context. Frequent words. (Click for all words.) 67 PHEVs 67 PHEV 65 hybrid electric 65 EVs 64 HEV 62 Li ion batteries 60 hybrids 58 lithium ion batteries 56 NiMH 56 Civic Hybrid 56 Transit Connect Electric 55 Volt 54 ultracapacitors 54 lithium ion 54 Electric Vehicle 54 diesels 54 hybrid powertrain 53 Hybrid Electric 53 Li ion 53 i MiEV 53 electric powertrain 53 Chevrolet Volt 52 lithium ion battery 52 nickel metal hydride 52 electrically driven 52 supercapacitors 52 Hybrid 51 Li ion battery 51 Lithium ion batteries 51 battery packs 51 Hybrids 51 zero emission 51 Highlander Hybrid 51 Camry Hybrid 50 Chevy Volt 50 V6 engines 50 Nissan LEAF 50 electric hybrid 50 Smart Fortwo 50 hybrid Prius 50 Toyota Prius 50 diesel powered 50 Honda Civic Hybrid 50 powertrains 49 EcoBoost engine 49 hybrid 49 Escape Hybrid 49 Nissan Leaf 49 Lithium ion battery 49 Prius 49 vehicles 49 Ford Transit Connect 49 electric hybrids 49 Mazda3 49 Fusion Hybrid 49 SOFC 49 Ampera 48 hydrogen powered 48 CUV 48 smart fortwo 48 electric propulsion 48 diesel engines 48 LCVs 48 drivetrains 48 hydrogen fuel 48 acid batteries 47 Fuel Cell 47 MINI E 47 Toyota Prius hybrid 47 internal combustion engines 47 EV 47 minicars 47 powertrain 47 Azure Dynamics 47 Tesla Roadster 47 RAV4 47 diesel 47 Camry hybrid 46 LED backlights 46 Etios 46 lithium batteries 46 Enova 46 Volts 46 autocatalysts 46 flex fuel 46 rechargeable 46 gas guzzling vehicles 46 Elantra 46 Electric Vehicles 46 combustion engine 46 minicar 46 Fisker Karma 46 exhaust emissions 46 rechargeable batteries 46 Cobasys 45 proton exchange 45 LED lamps 45 SUVs 45 FCX Clarity 45 electric 45 internal combustion engine