[derekp7]

A plugin hybrid can have a smaller range battery (as long as the range meets your daily driving needs). Ideally it would give you at least 60 - 80 mile per day range, not the 20 something miles that a lot of them provide.

A full electric on the other hand, needs a very huge battery as it need to give you about 300 mile range, to cover the edge cases. That is a lot of battery weight (and expense) you are carrying around. So the tradeoff is do you want to lug around a huge battery that you will mostly not use, or lug around a gas engine that you will mostly not use? About an equal tradeoff (esp. since the gas engine only needs to be enough HP to maintain cruising speed, acceleration can be handled by the battery, or have it set up as a serial hybrid).

Personally I'd rather have the gas engine as my range extender, instead of the larger battery, since I can quickly fuel up in about 3 minutes vs. 20 - 30 at a minimum. But once battery tech improves and recharge times are in the 10 minute range, I'd say that would be the end of gas engines.