Apple has already started working on the iPad 3 and securing deals with Simplo Technology Co. and Dynapack International Technology Corp. These will supply battery packs for the upcoming iPad, according to Taiwan Economic News.

The new power source will be thinner and lighter than the batteries that Apple used previously in iPad 2 models. The result will be an increased cost in the power packs used by the Cupertino company, of 20% to 30%. According to the same report, the new iPad 3 batteries will provide an even longer life than the 10 hours we got from the iPad 2, which is a brilliant feat.

With a thinner and lighter battery there’s the opportunity to stuff inside the next iPad that thicker Retina Display we’ve been waiting for a while now. However, Apple could only be happy with making the device slimmer and keep the same screen…