Tesla Battery

[Music or sound]

I do not understand why the Tesla Powerwall battery system gets so much publicity. They use (like their cars) Lithium ion batteries which do not employ the recent advancements in battery chemistry but use an extensive thermal management (liquid cooled). With the newest battery technology this would be not necessary! I wonder that Elon Musk built a battery factory and as the car sales are not high enough tries to find other means to sell the surplus production (and he is good at that with all the publicity).
Lithium ion batteries were developed for their energy density (important for mobile use/cars) but not necessary the best choice for stationary batteries where the most important criteria are reliability and cycle live!