No lithium-sulfur battery (so far) survives enough charge-discharge cycles to be attractive for portable electronics or electric cars. But higher energy density

No lithium-sulfur battery (so far) survives enough charge-discharge cycles to be attractive for portable electronics or electric cars. But higher energy density makes it potentially attractive over lithium ion batteries for aircraft. Even if you have to replace the batteries after e.g. only 100 cycles, that could enable multi-month missions for solar powered high altitude UAVs. The Airbus Zephyr was using lithium-sulfur batteries back in 2015: https://cosmosmagazine.com/technology/lighter-cheaper-satellite https://cosmosmagazine.com/technology/lighter-cheaper-satell...