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The company is performing dozens of different titles, including Meyerbeer’s “Les Huguenots”; a staging of two unfinished Mozart operas, “L’Oca del Cairo, ossia lo Sposo Deluso”; and plenty of war horses.

Firms such as Energous and Ossia send power using radio frequencies, while rival Wi-Charge uses infrared light that’s closer to lasers.

I got a look at Ossia Inc.’s Cota wireless power technology in Las Vegas last week.

Ossia says its technology can reach up to 30 feet right now, depending on transmitter size and the environment.

Both Ossia and Energous say that their technology has been tested for safety.