Application-relevant data such as cycle life, rate capability, and energy density are inaccessible via electrochemical standard tests in today's Li-S-lab. Because of the gap of lab cell characterization and prototype cell development, misinterpretations and false expectations of material development are frequently reported and electrode porosity as well as pressure on cell stack are neglected. The herein guidelines help to realize a breakthrough of the Li-S technology as a sustainable, safe, and lightweight energy storage option in the near future.