On every positive thing there's usually a drawback...
I mean, are you sure those batteries aren't nuclear? lol...
Anyways I thought standard Lithium batteries usually need replacement between every 1000 to 4000 recharges, not every 500.
It kind of depends on what quality of battery you get, and the size. Smaller batteries last less long then larger batteries.
In any case Lithium batteries usually last at least 3 years.
Like said, the drawback may be in weight, size, or just very environment unfriendly...
It's easy to only sell the good points.
BTW, talking about the VOLT, I had to think about electric motorcycles.
there are electric motorcycles available that will run 5 years on LI-Ion batteries before they need replacement (need a recharge once every 1,5 days, talking about driving 40 miles per day).
In that aspect the chevy Volt which lasts ?45 miles ? per charge needs a recharge every day, and lasts only 3,3 years.
In this case the electric vehicle has driven 300 days/year 40 miles/day.
For the Volt that'd be 80% of battery usage for 3,something years,and has a recharge cycle of 900 charges.
900 Charges are identical to the electric motorcycle.