EVs that go 1,000km on a single charge: Gel makes it possible
eurekalert.org
eurekalert.org
In section 3.1 cycle life did not really convince me. Eyeballing the chart, on cycle 200, just 82.5% of the capacity remained.
The above is somewhat of a best case scenario, but having the battery at 80% capacity after 8 years seems good to me.