Batteries can store and discharge about 6-10 times the energy required to create them in their lifetimes.

That number seems very low. Got a source?

I was wondering too and did some searching. It looks like the number is realistic. What I found...

I hope I didn't screw up the math. If I did, please ridicule me and mod me down....

Modern EV batteries which are temperature controlled and charge limited have, so far, shown extremely low degradation over 100,000K EV miles.

The owner of this Volt, who is a member of a Facebook Volt owner group claims to still get the EPA rated 35 miles per charge from his Volt after 120K EV miles...

http://www.voltstats.net/Stats...

I personally own a Volt with 32K EV miles and still get the same EV range...

http://www.voltstats.net/Stats...

One charge in a Gen1 Volt is about 10.5 kWh. This means that over 100K EV miles, a Volt battery stores in the neighborhood of 29 MWh of energy.

1/10 of that would by 2.9 MWh

A quick search shows 828MJ per kWh of capacity to produce a lithium ion battery pack. This equates to 3.68 MWh to produce a 16kwh Chevy Volt battery pack.

https://www.quora.com/How-much...

Given that those Volt battery packs have shown little to no degradation so far, it's safe to say they have quite a bit more useful life to go, so they will probably make it close to 36 MWh of lifetime storage, but they will eventually succumb to the laws of physics though and start to degrade.