The U.S. Navy uses them to generate oxygen in submarines.

CNN: Expert: Oxygen generators should be safe as cargo

That means they, too, can be used to generate singlet oxygen, given the right molecular intermediary.

ECONOMIST: Medicinal light-swords

The methanol fuel cell uses methanol and oxygen to generate power and is one of several technologies vying to replace lithium ion batteries that are commonplace today.

BBC: NEWS | Technology | Laptops with fuel cells approach

Fuel cell electric vehicles generate their power from hydrogen and oxygen, and emit only water.

BBC: Nissan FCEV on display at a car show in Brussels in January