How often do you need to charge a plug-in hybrid?

The Chevy Volt plug-in hybrid is designed to travel about 40 miles (64.4 kilometers) per charge, so if your round-trip commute, including shopping and any errands you need to run, is less than 40 miles (64.4 kilometers), you'll need to charge every evening.How to Charge a Plug-In Hybrid Vehicle | HowStuffWorks