It does have a "charge mode"
It does have a "charge mode" where the engine will charge up the battery, but I never use it, as I estimate plugging into the wall is 25-40% of the cost of using gasoline. Supposedly it takes about 3 hours to charge to 80% with gas. Even if you are not in charge mode, the car will keep enough power in the battery to run the car like a normal hybrid.