Multi-layered packaging films based on LDPE/Nylon 6/PET/OPP with superior selective barrier property for O(2), CO(2), and H(2)O and anti-corrosion property to strong basic and acidic solution were suggested to improve the durability of film-type Leclanche primary battery for battery-assisted passive (BAP) radio frequency identification (RFID) tag. An optimum adhesive gel electrolyte and its concentration (4.6 M NH(4)Cl (aq.)/13.7 wt% polyethyleneimine (PEI)/3.7 wt% Carbopol 940) were determined by showing the highest ionic conductivity as 1.94 x 10(-1) S/cm at 25 degrees C. Efficient fabrication processes such as screen-printings of conducting layer (25 mu m), active material layer (40 mu m for anode and 80 mu m for cathode), and electrolyte/separator/electrolyte layer (100 mu m), were also adopted to give better performances of the 1.5 V-class film-type battery. (C) 2010 Elsevier B.V. All rights reserved.