Kindle, but Barnes & Noble begs to differ -- and it has some numbers to back that up. Earlier today we received a statement from the company explaining just how thrifty the new Nook is when it comes to sipping from cells. With WiFi disabled on both devices, B&N says it managed 150 hours on the new Nook when turning a page every minute. The current-gen Kindle, meanwhile, petered out after 56. That's almost three times as long and maybe, just maybe, enough to finally get you through Anna Karenina on one charge -- or at least through the Cliffs Notes version. More details on the testing overview below, which we promise can be rather more rapidly ingested.