Earlier quoted context omitted.
Off-topic, but something I learned... I thought surely you meant the "Duracell Bunny", however the Energizer Bunny does indeed exist, and apparently although it's the later of the two, Energizer successfully registered the battery-powered bunny trademark in the US and Canada[1]. Here in the UK I'd say the Duracell bunny is the first to most peoples' minds. Yes, yes, it's Friday! [1]: https://en.wikipedia.org/wiki/Dur…
Haha, today I learned the opposite of what you learned. "In Europe & Australia the term "Duracell Bunny" has entered the vernacular as a term for anything that continues indefatigably while in North America the term "Energizer Bunny" has a similar connotation."
The power of advertising and repeated exposure. It works :(