Procter & Gamble-owned Duracell will give its brand mascot a voice to host question and answer sessions on Facebook along with sharing tips and prize giveaways.
Since making his silent TV debut in 1973 the Duracell Bunny has not had a voice, but will be given one from tomorrow (3 April) for the Facebook campaign.
Leigh Tomlinson, business leader for Duracell UK & Ireland, said: "For the past 39 years the Duracell Bunny has never been given any kind of voice and it has been left to people's imagination to give him a personality.
"It's a big step for Duracell as a brand and not something which was taken lightly. No doubt we will be seeing, and hearing, a lot more from Bunny in the future."
Follow Matthew Chapman at @mattchapmanUK