40 and may be a substrate such as tape that forms the channel s 38 which are longitudinal relative to the battery 34 further the longitudinal channel s created by the preservation element 42 may be either concave or convex in shape against to the casing 40 now referencing fig4 a channel preservation element particularly for a non limiting prismatic shaped battery is shown in the fig4 cross sectional view the battery 44 has a jelly roll 46 a casing 48 and a pressure relief feature 50 such as a pressure relief valve or weakened portion of the casing further the battery 44 has at least one channel 52 located between the jelly roll 46 and casing 48 and the channel 52 is maintained by a preservation element 54 the arrows in fig4 represent various directions gas may travel through the channel 52 to reach the pressure relief feature 50 where the gas may then exit the prismatic shaped battery 44 the channels 52 established by the channel preservation element 54 are as shown sinusoidal or zig zag in shape another non limiting embodiment of a channel preservation element particularly suited for a prismatic shaped battery is shown in fig5 fig5 shows a rectangular cross section of the non limiting embodiment a battery 56 being substantially.