Simplicity of energy storage system

What about energy the size of 200Ah lead acid battery in suite case with a weight less than 10kg? Lithium ion battery has made this possible. Compactpower 500watts all in energy storage unit is combination of hybrid inverter, battery management system and battery in one in lithium form. Ideal for homes, offices, small businesses, critical equipment etc. Also comes in 2000watts which has lithium battery ion battery capacity equivalent of 2 x 200Ah lead acid yet weighing less than 27kg.