The smart folks over at the Louisiana Tech University are busy working on new voltage regulation circuits that can convert a piezoelectric charge into usable voltage for charging batteries or directly powering electronics. With this technology, a device can be fit into the heel of a running shoe, allowing users to generate electricity as they walk, which hopefully will be enough to power your flat mobile phone when you’re lost in the jungle. If this does become mainstream, it could be a cute way to stay healthy and keep our devices juiced at the same time, wouldn’t it?