● Nickel-plastic foil

Replace the aluminum layer with nickel on traditional alumiunum –plastic foil, and nickel layer exposed on edge; Features:
 The nikel layer is thinner than aluminum layer;
 Good puncture resistance;
 Good corrosion resistancde;
The exposed nickel layer on the edge is welded by laser in the case of traditional plastic heat sealing,so it will never liquid leakage.
Obtain advantages of both hard shell and pouch battery.