According to a new US Patent filing (20090035609), Apple is applying for a universal battery format that could see batteries recharged from various devices. The idea is to let various devices with non-conventional batteries be recharged easily from a mainstream source. There would be a primary Apple hub type device to recharge multiple batteries, or you can easily recharge your devices from say your keyboard as you would your phone. The batteries would also perform like your cell phone battery with the ability of your computer or the Apple recharger hub to display the current charge and energy levels. There is no word on whether Apple will actually ever release a product, but hey, its always worth applying for a patent.