Doesn't seem to have worked out so well for Lightsail Energy... http://energystoragesense.com/uncategorized/lightsail-another-setback-for-thermo-mechanical-ene

Doesn't seem to have worked out so well for Lightsail Energy... http://energystoragesense.com/uncategorized/lightsail-another-setback-for-thermo-mechanical-energy-storage/ http://energystoragesense.com/uncategorized/lightsail-anothe...