An inexpensive, rapid and simple method to fabricate flexible zinc-copper electrochemical batteries on a hydrophobic (wax) paper through laser-assisted patterning of metal tapes and salt-impregnated filter papers, with lamination employed for packaging. Experiment results showed that a 3-cell battery lit a green LED (1.70 V) for half an hour and achieved a power density of 0.22 mW/cm2.