[adoyle]

The text says “a current with a potential of up to 1 volt.” The key word is potential, i.e. electrical potential whose SI unit is the volt. That must be the amount of potential that this particular chemical reaction can create. Since the current probably depends on the amounts of the chemicals involved, the article doesn’t state that.

[mlyle]

The text now says that, yes, but the original did not according to archive.org.

[buescher]

It's an elegant fix that adds nothing.