Duracell Bunny is any of several anthropomorphic pink rabbits powered by batteries, used to promote Duracell brand batteries. In commercial advertisements, the Duracell Bunny is actually only one of these rabbits, powered by a Duracell battery rather than rival batteries. The point of the advertisement is that the bunny powered by a Duracell battery can continue functioning for a longer amount of time before its battery runs down.
The advertisements usually feature the bunnies competing in some way, for example a game of soccer or a race.
The Duracell bunny predates the Energizer Bunny, which actually began as a parody of the Duracell bunny toys that became a collectible item. People often get the two confused, although there are distinct differences between the two. There are differences in appearance — the Energizer bunny wears sunglasses, has larger ears, is a different shade of pink and has a different body shape. Also, while the Energizer bunny is a single rabbit, the Duracell bunnies are a species. The Energizer bunny is always depicted with a drum, as the Duracell bunny toys of which it is a parody had drums, but the actual Duracell bunny advertising campaign has moved beyond this, and Duracell bunnies are usually depicted as doing something other than beating a drum.
The Duracell Bunny does not appear in North America, due to the now iconic status of the Energizer Bunny.
The Duracell bunny was originally trademarked for use in the US and other countries. Duracell failed to renew its US trademark of the bunny and as a result lost it. Energizer seeing an opportunity trademarked a new bunny for its use.