Are you counting the energy that can be released from the batteries by reacting the lithium with oxygen in a fire? As I recall, the electrical energy storage of a lithium battery is only about 10% of the energy that gets released if you burn it.
Yeah. Its meaningless to say "energy stored" without indicating the kind. Electrical potential? Chemical potential etc. I just looked it up. I'm going to have much fun the next time someone tells me that lithium batteries have a much lesser energy density than gas.