With Li-Polymer batteries become more mainstream as of 2011-2012, we've seen a change in our how smartphones are being manufactured. Companies can now further edit the structure of the battery, making them thinner than before to please today's consumers. Imagine, then, an even more flexible type of battery; one that can bend up to 300%.

Yonggang Huang, an engineer from Northwestern University, has created just that with the help of John Rogers from the University of Illinois. These stretchable batteries would initially be used in the medical field to help keep track of patients - for example, a heart monitor could be embedded into cardiac tissue.

The researchers were able to create this by placing several individual battery storage components next to each other. These are all connected with wavy wires to ensure that the material can still move around, while the rigidity of the small battery parts themselves help ensures that they don't break.

If this type of technology ever hits the marketplace en masse, we may see it spill over into other electronics, primarily phones, where a varying size of battery would help determine the size of the machine itself.

Source: NBCnews