Electrolysis of water

Hey /sci/,
Is carrying around a battery and a liter of water an alternative to carrying around a helium container?

A liter of water makes about 1200 liters of ideal H2 at STP.

>>9
As I recall, the Mythbusters thing was inconclusive.
It may surprise you, though, that legitimate authorities have had an interest in figuring out what actually caused the disaster that spelled the end of an entire industry, and their investigations have been a bit more clear on the matter.