Patent ID: 8734980

Claim:
An electrical device comprising: an electrical apparatus including: an apparatus substrate having a first side and an opposite second side, an active electrical component provided on said first side of said apparatus substrate, a flexible flat battery fixedly connected to said opposite second side of said apparatus substrate, wherein said battery is for providing electrical energy to said active electrical component, a first electrical contact electrically connected to said active electrical component and printed on said second side of said apparatus substrate, and a second electrical contact electrically connected to said active electrical component and printed on said second side of said apparatus substrate; wherein said flexible flat battery including at least one electrochemical cell including a printed electrochemical layer comprising a cathode layer including a first dried or cured ink, and an additional electrochemical layer comprising an anode layer located adjacent to said printed electrochemical layer, wherein both said printed electrochemical layer and said additional electrochemical layer are each at least partially covered by a same liquid electrolyte layer in contact with both said printed electrochemical layer and said additional electrochemical layer, and wherein both of the cathode layer and anode layer are provided on a same battery substrate layer such that the cathode layer and the anode layer are thereby arranged substantially co-planar, said battery having a first side and a second side, with said first side of said battery fixedly connected to said second side of said apparatus substrate, said battery further including: a first electrode contact printed on said second side of said apparatus substrate and connected to said first electrical contact, and a second electrode contact printed on said second side of said apparatus substrate and connected to said second electrical contact; wherein said first and second electrode contacts are each connected to a selected one of the electrochemical layer and additional electrochemical layer of the electrochemical cell.