"Imprint Energy aims to reshape the battery landscape. Currently available battery technologies limit the pace of improvement in design and functionality of portable electronic devices. Imprint Energy will address these shortcomings with its breakthrough zinc-based rechargeable battery technology, Zinc Poly™. Zinc Poly™ battery technology removes longstanding limitations on the rechargeability of zinc-based batteries and enables the production of ultrathin, flexible, high energy density rechargeable batteries for significantly lower cost and without the design limitations or safety concerns of other battery technologies."
I think they say the batteries can be printed on modified textile printing equipment. I contacted them recently because I would love to use this tech if it lives up to their claims. They wouldn't give me any sort of details like how much energy is stored in one of the square inch patches they are showing though.