Bono has said that the next U2 album will only be released when it's completely ready, NME reports.
The frontman revealed that U2 are working on their 13th album, believed to be titled "10 Reasons To Exist". Speaking to The Sun, Bono said: "U2 have been back and they're really in fine fettle."
He added: "They're mad for it at the moment and they really want to make a new record. And they don't care if it takes 10 years they don't care if it never happens again, they just want to get it right. Within the band we've been calling it '10 Reasons To Exist' but I will tell you we might have at least six of them."
Meanwhile, U2's The Edge has announced that his Music Rising charity has launched a Hurricane Sandy relief fund.
The guitarist founded the charity alongside Gibson Guitar CEO Henry Juszkiewicz and producer Bob Ezrin, to provide musical equipment and financial support to musicians, schools and community organisations affected by Hurricane Katrina in 2005.
It has now shifted its attention to those who have been worst affected by Hurricane Sandy, which destroyed lives across the tri-state area of the United States of America in October 2012.