A new patent unearthed by Apple Insider titled "Increasing Energy Density in Rechargeable Lithium Battery Cells" shows that Apple's got its sites set on your iProduct's longevity:
The CC-CV charging technique would allow the thickness of the anode active material inside a battery cell to be increased in both "volumetric and gravimetric energy density." But while the density of the power capacity would be increased, the size of the battery, as well as its maximum charging time and minimum life cycle, would remain unchanged.
Packing more life into the same sized battery? It's maybe not as exciting as some of the crazy interface patents and such we've seen from Apple, but it's one of the more practical, and achievable, and quite frankly useful. Here's hoping it's high on Cupertino's priority list. [AppleInsider]