You should get a quote on what it will cost to swap out for new batteries and factor that into your $2 fill up cost.  Batteries have considerably lower life than a gas engine, so don't be fooled by the relatively low cost of charging.  You have to factor in the life span costs.  Sure the govt gives you a break on the original cost of buying the batteries, but no subsidy exists for the 2nd or subsequent go around.

Currently we have a fleet of battery powered drivers and drills for work.  When the battery goes, which is maybe 2 years, we throw away the tool and buy a new one.  Why the cost of replacement batteries is almost equal to the cost of a replacement tool with new batteries.  It just does not make economic sense to buy replacement batteries.

I see a whole slew of junk electric cars, simply because no one will want to replace the batteries.